The answer is NOT 1. Dividing by 0 is not the same as “do not divide”. Please see 2:46 again. 1 divided by 0 is undefined because we can’t have a number that multiplies with 0 to get us 1.
“Math is a tool to solve problem in reality”. No, and thanks God it’s not that. It’s ALSO that, but not all knowledge derives from a practical problem. We can use reason and create math just for the pleasure of it, and sometimes what we built just as an exercise get used in a problem from reality
In simple terms if you have one thing and nothing divided it then the same thing still is. Mathematicians like to make up their own stupid shit to reason the fact they cannot figure out how the universe is made by numbers(because they are not God)
I had to do a book report in the 2nd grade on an animal, I chose the Tasmanian devil. The teacher yelled at me, ridiculed me, and said it had to be a real animal, not a cartoon. I went to the encyclopedia and to the principal she made her apologize to me me. She was not happy.
Reminds me of during the ticketing process for the Atlanta Olympics, a ticketing clerk was unaware that New Mexico was a US State and told the purchaser that they had to order tickets through their home country. "old Mexico- New Mexico....you have to order from your own country.."
I am impressed, but you must be new to his channel because that's basically his thing and where the channel name comes from (Black Pen Red Pen -> bprp). It is indeed quite satisfying and I recommend you to watch some of his more advanced calculus videos where this skill is displayed in full potential.
It's an acquired skill. Spend enough time at a whiteboard, and you'll find yourself juggling markers with one hand. It's not terribly different from the skills we see older generations use with Blackboards.
@@meerak915, black boards require significantly more pressure to make a readable mark, and colored chalk is less common than colored markers. I have absolutely never seen anyone handle more than one piece of chalk at a time (unless the were using a specialized tool, such as for drawing music staves), and chalboards were still being used when I was in school.
I prefer "Invalid Operation" vs. "undefined". "undefined" implies that there is a value but the value is undefined, where "invalid operation" is more specific in that you can't perform the operation. Yes it's splitting hairs.
I would say “dividing by 0” is an “invalid operation”. On the other hand, the equation 1/0 = Y is “undefined” as “Y” has no definition. It may be helpful to plot the equation 1/X = Y and look at the area around where X approaches 0. As you approach from the negative direction Y approaches -♾️, and when you approach from the positive direction Y approaches ♾️. So the function 1/X = Y is not a continuous function and is not defined (undefined) at X = 0. This is where the term undefined for 1/0 comes from.
As a math teacher, this hurts me a lot... What hurts the most isn't the lack of math knowledge though, it's the fact the teacher refuses to admit that they may not know something, and perhaps learn from it... I teach senior mathematics and almost every week I get asked a question from a student I have no idea of the answer to. Imagine if I just came up with answers and refused to change my mind because the "student can't possibly know something I dont"! I'd be a horrible teacher! Instead, I admit I don't know it, and either work it out with the student, or ask them to find out the answer and teach me something!
I feel like as you move up in grade levels math teachers become more understanding of their errors / mistakes, especially since the concepts become a lot more complicated. My algebra and algebra 2 / pre-calc teachers would always mark off points for me without a second thought even though I would do the problems correctly, just not their method. Now with my Calc 3 teacher and my BC Calc teacher they would always be understanding and mess up at times. As you go up in math level teachers understand how complex math is more and more, so I think thats why many elementary school math teachers will do this sort of thing: they don't understand the higher level stuff
Sounds like you are a good teacher. I am a university maths professor. The more I do mathematical research, the more I understand about how many things there are that I don't understand, but I enjoy learning new things all the time. I particularly like it when a student points out a mistake I have made, because then I know that someone understands and is following my argument. As I have taught for many years, I rarely get undergraduate questions that I cannot answer, which makes it less exciting in some ways. With graduate students it is completely different: more like a joint endeavour, approaching a problem where we don't always know what the answer will look like, or sometimes, we don't even know if there is an answer!
I am a teacher too. And I make mistakes, sometimes. And I used this opportunity to teach my students how to avoid making the same mistakes. To err is human. We all do that. It is just some doesn't choose this opportunity to grow.
When my youngest son was in high school taking AP algebra II, his techer did not understand the material. She would count some of his work wrong because the answers in the teacher book were wrong. He would have to prove to her that the book had the wrong answer. Unfortunately this happened more than you would expect from a school book publisher.
@@Vasu_Polu You are so correct... (TRUE) Knowledge and wisdom is BASED on absolutes... Example: Man and Woman is an ABSOLUTE... Stupidity is based on ignorance: Romans 1:22 Professing themselves to be wise, they became fools... (The Bible)
When my kid was in grade 1 or 2, the teacher taught them 2 - 3 = X (the letter, not as in algebra). When she had asked the class if it is possible to do 2- 3 my kid was the only one who put up her hand to say yes you can, and was told she was wrong. I emailed(correction: wrote a note to) the teacher saying I understood that she didn't want to teach kids about negative numbers in grade 2, but that telling my daughter she was incorrect was not ok. The next day the teacher went over it with the whole class and told my kid in front of everyone "you were right and i was wrong" and "you guys will learn about this next year". To this day the whole thing ended on a positive note and was a positive experience for my kiddo. There were no hard feelings.
Ugh same. There is so much crap being taught during the first two or three years in school. I remember being told that a small number minus a biggre number is unsolvable. Not tricky, not something that we learn later. Just unsolvable, period. I got scolded for naming letters of the alphabet by their names as my parents taught me. But instead of "Ah, beh, tseh, deh,..." in school I had to say "Ah, buh, tssss, duh, ...." Or else. It was fricking annoying. And ever since back then up to now, I never saw a reason to pick up my crushed respect for elementary school teachers.
I can see why they might have wanted to avoid explaining what a negative number is, but the modern way to teach little ones is with number lines and creating a negative number by "jumping over" the zero would have been easy for the teacher to demonstrate. Much better than outright saying your child was wrong.
We had something similar with my daughter's teacher in primary school. My daughter is on the autistic spectrum and a lot of things were difficult for her at school. In maths she struggled with addition and subtraction. I spent time with her one weekend, using the classic column method (units, tens hundreds etc) and she got it almost immediately. She was calculating very large numbers easily and went to school proud with what she learned. Despite having the right answers the teacher told her she was wrong. At parents evening the teacher told me I was wrong for teaching my daughter that way because that year was all about number lines. I blew my stack. Teaching so rigidly could have set my daughter back that year and I'm glad that she was able to find a method that worked for her. That was a long time ago; she got a B at GCSE maths and has a science degree!
Why was this even a question asked of kids that age? Pretty simple to deal with it, don't mention it in the first place, and if any kids ask, tell them they will learn in more advanced classes
My brother once told a cool story to his 6th grade teacher about how he caught a preying mantis over the weekend and watched it fly away when he let it go. The teacher told him to stop lying because mantises can't fly. That day during their library time my brother printed out some images of preying mantises flying and showed it to his teacher all proud. He got a detention for wasting paper and ink.
This type of behavior from teachers is dangerous because kids can end up becoming disillusioned and not trusting any teachers and become rebellious while sabotaging their own education. I remember resenting teachers after my kindergarten teacher got into trouble for beating me until it drew blood. I carried that hatred all the way through up to high school.
when i was in grade 5 i spent rainy days drawing diagrams i found in our encyclopedias, my favorite was the inside of a high pressure sodium bulb, it reminded me of a space ship or lunar module in miniature. one day during recess i found an actual real life high pressure sodium bulb behind the school in a landfill area! it was still in the cardboard and new, i was so excited, i imagined removing the glass and mounting it on a piece of wood for display, i was so excited! my 5th grade teacher saw it in my hand and took it away from me ,when i told her it was a high pressure sodium bulb and i made a diagram of one at home, she yelled YOU HAVE SUCH A VIVID IMAGINATION ! and acted very angry and stole my find. i had never heard the word "vivid" before and it caused me to pause, (making a mental note to later look that up) but i felt like she was calling me a liar. i told my mother and big brother when i got home and my brother said it was worth $40 and she probably took it to the electric company , my mother didnt support me or talk to the teacher or anything. that teacher was very violent and beat me with a wooden paddle once a week all school year. her name was Mrs. Carter in hobart indiana at ridge view elementary school.i learned nothing at school that year(but i did at home!) i lost all interest in school after that but i quit at 12th grade and went to night school in merrillville indiana and graduated early from there since i only needed one more credit.
I remember having a science teacher in elementary school and we were discussing planets, and he mentioned that only saturn had rings. We had a small book about planets at home that had photos of uranus and neptune having rings as well and I brought that book to school and showed him. Instead of insisting on what he said, he smiled and told me it was probably a new finding he didnt know about and corrected himself. Until this day, I think this encounter w this teacher enabled me to speak up easier.
that’s so sweet :) it makes me happy to see adults encouraging kids to ask questions. as you said, i think it helps them be more capable of being able to speak up as well as critically think as they get older. if i were that teacher i’d be happy that one of my students was that attentive to still be thinking about it after school
Out of curiosity, how old are you? I’m 51 and we were taught the giant planets all had rings, which I assumed was known for awhile. But I see Jupiter’s ring wasn’t discovered till 1979
@@spidey1z I'm in my early 30s, but the education for elementary schools here aren't very updated back when I was studying. I was lucky to have supplementary materials my parents gave us when we were interested in certain topics.
Even my calculator knows this. If I input ONE divided by ZERO, my calculator responds with "Math Error" - but if I input ZERO divided by ONE, it correctly displays ZERO.
I taught Algebra 2 before I retired several years ago. We were discussing a unit on Matricies and how to manipulate them. One day, a young lady raised her hand and said that was not how her father, a mechanical engineer, showed her how to do it. I could have said, her father was wrong, but, I asked her if she would like to come to the White board telestrator and show us all how her father taught her. She was reluctant, and I assured her she was not in trouble. She came up and did a wonderful job and provided the students with another way to rackle the problem I had not thought of. I thanked her and told the students I had learned something I had not known and it gave the students another way to solve that type of problem. I noticed the principal had slipped in half way through the student's explanation. She asked me later if I always have students help with the teaching, and I said yes, when the situation presents itself. She said, "You do know that's called peer teaching/learning, right"? I told her that's what I had learned in my Master's program and made it part of my Master's Thesis!! Nothing wrong with admitting you might not know everything as an educator!!!
Thank you for being a true educator when I was very young and at about 1st grade lvl I was punished for using my photographic memory to learn math. It destroyed my confidence and put me behind a wall I've never been able to get past. I gave up on traditional schools at 17 and got my GED in 1985 I got very high grades in all except math. I did pass in top percentile in the other subjects. Math not so well. It still hurts so much. What could have been. Especially in science.
Wish my teachers were like that. I got detention for correcting teachers (history) every year they talked about something not in the books and every year they got something wrong. Got alot of detention for it even after I showed proof
@@br4524 A photographic memory is a highly valuable skill and should be celebrated. Unfortunately, math is hard, and sometime our best skills interfere in learning other skills. Just look at any brilliant person that has ADHD. They tend to excel early and struggle later. I once got sick and missed a lesson on long division, then came back to school and had a long division test. Got almost all the right solutions, but didn't actually use long division, so I failed the test. Luckily, that teacher had been a great one, and took me aside to actually teach me instead of punishing me. Too often, punishment is just assumed to be a valid teaching method just because it sometimes is, and turns out completely pointless.
This is a great time to teach your child that teachers can also be incorrect and to always keep an open mind and question the experts! Thanks for an amazing explanation!
Clearly this teacher is not "the expert". It doesn't take any type of expertise at all to know you can't divide anything by 0 (aside from this video explaining it very well all you have to do is just think about it for like 5 seconds). The teacher and the principal are idiots.
Most teachers learn the lesson plan just before the class and forget it after the class is over. They just regurgitate what is on the lesson without critical thought or really knowing the subject. There was none of this undefined crap when i was in school. 3 divided by nothing at all is still 3 because you did not do anything to it to divide it. Same with 1 divided by 0 which is 1. I was taught any number divided by zero is always going to be that number as it cannot be anything else. To say it's undefined when it really is easily defined is Really Dumb.
@@TheRythimMan I don't care what you say because you don't have the mental capacity to know how stupid it is. If you have 5 fingers and you take nothing away from them meaning you do not divide or split them at all, you still have 5 fingers. It's the exact same as dividing by zero. It's essentially telling you, you are not dividing anything at all from anything. Now I do understand why you cannot see the problem, you are taught by your uneducated teachers that you live on a sphere in a vacuum that has a sphere shaped atmosphere that fails to behave as gas laws and the laws of thermodynamics tell us gas must behave. You already believe so many lies you cannot see a fact in front of your face.
Dividing by zero is undefined in math. It doesn’t yield a meaningful result, as there’s no number that you can multiply by zero to get a non-zero number.
In fairness, I might have had an easier time in life if I knew from an early age that people in authority are often wrong, and if I had been taught how best to handle that situation. Trying to correct them is seldom a winning strategy. An incident like this could be a teachable moment.
If someone with authority over you is simply wrong….. and this happens in school, in business, in life……. There’s honestly not much you can do 🤷🏼♂️ the strategy of, calmly and logically explain to them why they’re wrong, almost never works
Most schools don't teach traditional math like long division anymore. I used to be a "brick and mortar" school teacher. I teach online now, and most of the kids I teach math to have NEVER seen traditional long division.
@@jakemccoy Probably by using a similar thought process of finding max-multiples and subtracting them from the original value the same way we do for long division. The way we write long division is just an organizational pattern for recording the computation we're doing in our head, but it's equally effective to just jot down the numbers on a pad as we find them to reach the right answer, it's just not as pretty to read it back. How much you value readability of the process of solving VS the final answer being correct is what determines if learning long division as a tool is worthwhile.
The question itself is invalid. There is nothing to divide with. 1 divided with a blank space is not a math problem. 1 ÷ _. That is essentially what you have.
@@deker0954 This argument is totally wrong as 0 is not treated as a 'blank space' in Maths and not even in division. When it's the other way around i.e. 0 is the dividend and 1 is the divisor, then you do have an answer and it's 0.
@@adityajha67071/0, 1 divided amongst 0 people. 0/1, 0 units divided amongst 1 person, that one person would have 0 units, because if it's a single person, they will have the entire set.
A couple years ago, my daughter's 6th grade teacher tried to tell her a problem I helped her with was wrong and wouldn't accept my correction. So I went online and found the teacher's edition with all the answer keys, and it was wrong too. I emailed McGraw-Hill and they acknowledged the mistake, apologized, and fixed it. The teacher still refused to admit she was wrong.
I had this same issue with a teacher back in h.s, bit of back story, i had ADHD (still do) and the PEMDAS thing never made sense to me nor could i figure out any problems using that, so one day teach drops our usual 10 q's pop quiz and i decide to try my own method of working out the problems, aced all 10 questions but i was given a 0/10, even after walkimg the whole class through my steps, all of whom came to the same answer they had, just without using PEMDAS, but because my method wasnt "in the book" i was still wrong, didnt matter that my answers were 100% correct, i was failed because i didnt use the "approved" method, well i ended up suspended for 2wks, and she lost tenure because of that, i guess you cant call your teacher a stupid bitch who needed to go back to college without getting in trouble, and i guess you cant tell your boss you wanna kill a student and still keep your job😂😂😂😂
Well, you put her on the spot and she refuses to correct her mistake despite irrefutable evidence-it became a tug of war between you and her and I NEVER would put any teacher in a spot.
One of the most important lesson I learned at school is that, sometimes, adults can be completely clueless and ignorant. In 6th grade (11yo), I've been laughed at by my (catholic) religion teacher for telling her that the stars are immense balls of hot ionized gas, many of them much larger than the Sun. To her, stars were tiny specks of light, and that's it.
My 6th grade teacher said the Earth does a full rotation every day. Half by morning half by night. The classmate called her out LOL Edit: I meant Revolution. Enough with the inane replies.
What the parent should do in this situation: Look it up in a proper math-book written for adults, and show it to the teacher and principal. And if they are insane enough to refuse the content of a proper math-book, then you need to consider changing your kids school, because that tells a lot about that school.
@@khatdubell I think it would be fair to give them a chance to realize, that they had misunderstood some basic math, and then rectify it... And I would be surprised if they would still double down, if shown in a proper math-book.
Even simpler. Ask them to pull out their cell phone and show you that 1 divided by 0 equals 0. When their “all knowing” device’s calculator throws an Error they should be sufficiently bamboozled into capitulating that the problem is not as straight as they thought.
The teacher and principal could at least punch that into any dollar store calculator and see that the result is error, and not 0. Ignorance plus arrogance is a deadly combination.
@@UCRjGzq33NDIz-YPwfuDBM8A that state meant is just stupid. Computers are "smarter" as you put it than the entire history of humanity. Only limited to stuff with a system already built.
In 4th grade (1969-1970) I got a "C" on a science presentation because I pointed out that the sun is a star and stars are distant suns. My teacher pointed out that this was ridiculous because anyone can see the difference between the sun and a star. When my son was in 4th grade his teacher tried to explain paramagnetism and totally screwed up the explanation. I explained how it worked to him for his homework and the teacher marked it as wrong. I set up and appointment and went in with the text from my graduate level electrical engineering class on electromagnetic fields and showed her the truth. (The fact that it was covered in a Master's of Electrical Engineering text should have tipped her off that she was not only clueless, but that she shouldn't have been covering the subject in a 4th grade class.). She was a clueless and stubborn as my 4th grade teacher. Edit: People keep commenting on semantics of the english language and how the teacher was right in the usage of the term "sun" vs. the term "star". They're missing the point that she was convinced that they were completely different types of physical entities and that a star wasn't the sun of it's solar system and that our sun wasn't a star to another solar system. In her words, the sun was as physically different from a star in its structure as it was from a planet. Stars would still appear to be a star (same size and brightness) even if they were the same distance from the earth as the sun.
first time through i misread this as as "tried to explain pragmatism" and wondered why you brought text from an electrical engineering class to explain pragmatism, then i looked again and it made sense.
My daughter has a math teacher who has a bunch of kinder eggs with him at all times. Every time a pupil spots him making a mistake in a math calculation, that pupil gets a kinder egg.
And this is the kind of teacher we all remember for the rest of our lives. The one that engages us, the one that gets us to think critically about what is presented. Everyone should have a teacher like this but unfortunately most never experience it.
He'll be taken out by the government soon for teaching independent thought to children Can't be having that now, how could our governments indoctrinate them on social media if we teach them to think for themselves? It's just not fair
I used to do similar in my junior high science classroom, changing up the prizes from time to time. Sometimes little plastic dinosaurs, bonus points, free time, etc. They were always hoping I'd make a mistake (and I usually did each period once a week or so...wink, wink).
And the fact the principle came up with the same answer says a lot about the school as well. If anything I'd suggest this person bail from that school.
It's not embarrassment, it's ignorance. I'm inclined to think that both the principal and the teacher genuinely don't know. It's the dumbing down of a generation.
It is a skill every one of us has to learn when we are put into a position of authority. Whether a cop, a boss, a teacher, or a parent, we will eventually do something where we mess up and have to eat crow.
@@klassike It's a club. The principal and the teacher are in an alliance against the parent. Our tribe must defeat their tribe, the winner is always correct.
I’m embarrassed for the principal. The teacher CC’d the principal for leadership and what came in return was support of an error rather than a proper correction.
@@valeriereneeharper I assume that the principal has graduated high school and hopefully at least a four year college... Everybody who has graduated high school should know the answer. This must be unique to the US and some third world countries where totally ignorant people can get education jobs.
I was originally taught that something div 0 was infinity, and shown as 'evidence' how the answer gets larger as the divisor gets smaller, trending to infinity. Then I asked about negative numbers, which grow toward negative infinity. At zero, the answer is undefined, because that is where the discontinuity is.
@@chaoticignorant483 Age matters because back when I (and you) were in school we learned correct math/math solving skills. Obviously today’s kids are being taught a lot of junk.
@@Linda-s7o Sorry ma'am, but there were still issues with teachers being incorrect about things back in our days. We just didn't have the internet to tell the entire world about it.
I remember my Advanced Maths teacher (basically early calculus) showing us this answer, which was not in the curriculum whatsoever, with the intermittent joking of never dividing by zero or you might get sucked into an alternate dimension ("people divided by zero before and we've not heard or seen them since!"). He was a great teacher and knew how to make his class entertaining.
You can divide by 0, you just need more information is all. Because dividing by 0 gives you two answers. Infinity and negative infinity. That's why it's undefined, not impossible. "Divide 1 by 0 assuming you approach 0 from the positive side." This actually can be divided, giving you the answer of infinity
@@poa2.0surface77 Buying something is not division. It's subtraction. But I'll explain why dividing by zero gives you both infinity and negative infinity. 1/1=1 1/0.1=10 1/0.01=100 1/0.001=1,000. As you get closer to 0, the result gets higher and higher. When you reach 0, you've reached infinity. Why this results in negative infinity is because it works the other way as well. 1/-1=-1 1/-0.1=-10 1/-0.01=-100 1/-0.001=-1,000. So as you reach 0, you also get negative infinity. This is why dividing by 0 is undefined. Not impossible.
@@poa2.0surface77 0 x1 means repetition of 0, 1 time which is 0, or it also means repetition of 1, 0 times which again is equal to 0. (hmmm, you know, the concept of nothing) Perhaps you've forgotten that multiplication is simply repeated additions.
I've been there when I was in high school. Reason and logic won't work. It will require AUTHORITY. You can try a Wikipedia reference or a college text book. But a letter from a college professor (with all his/her degrees mentioned along with papers publiched), copied to the principal and to your kid, is probably the most effective. Don't get worked up, but also don't give up. You can also turn it into a lesson for your kid: adults are not always right.
I would just change schools, especially since in the last year we’ve seen a lot of people who agree with me that if people in charge are doing stupid things, you best off going to places where they’re not in charge
@@S8EdgyVA This is too small an issue to change schools over. But if there are a lot of these, then perhaps. In a large city, changing schools might be possible, but in a small city, no. I grew up in a city of around 10,000, which was the biggest city in 100 miles. The next high school was 25 miles away.
I'm convinced the absolute best thing a teacher can teach is how to accept being wrong. Everyone makes mistakes and modeling how you handle making a mistake is a critical lesson that too many people haven't learned. Normalizing failure, mistakes, losing, or just plain old being wrong, is something our culture (particularly the US) NEEDS.
Refusing to admit fault is also a fantastic way to get your students to hate you. I'm still pissed at a history teacher who gave me a zero on an all or nothing quiz because of one question that I didn't get wrong. He was wrong, but refused to admit it and my grade suffered. It's been years but I'm still mad about it.
kudos to the host of leaving the silly school politics out. imo the organic answer that cannot be calculated or arrived at by formula is - one. for example if there is one pie and there are zero people sharing the pie..... you have one pie. this is a rare example in mathematics where you truly have to think outside the box.
My dad was a maths teacher and he explained it to me this way: If you have zero Skittles and want to divide it equally under 4 friends, how many skittles does everyone get? That's right, zero. But what if 4 skittles are lying on the table and nobody is there, how many skittles does everybody get? That's right, makes no sense. And that's why you can't divide by zero.
I am a third grade teacher. I happen to know that 1/0 is undefined (I tell my students that it doesn't exist if they ask), but I never understood why. Your explanation made it clear to me. Thank you!
see i really do have a problem with the undefined answer though, if i have 1 banana and divide it by 0, i still have one banana or say i have 4 of them and divide them by 0, i'll still have 4, dividing something by nothing doesn't make the 'something' change in any way, so it is still a defined number.
@@robgilmour3147a banana is a banana it is not an integer but an object so your banana will not magically disappear. Your rationale is being hampered by your level of abstract thinking.
@@robgilmour3147 If you have 4 bananas at the end then you actually divided by 1. You divided the bananas so that you have 1 portion of banana. Dividing by 0 is literally impossible since you can't divide into 0 portions. But the real answer here is don't think of numbers like objects because that makes things difficult when learning complex numbers.
My god. The fact that you can't figure out why it would be undefined is shocking to me considering you are a teacher. You do not need this elaborate explanation you need a functional brain. How can you divide anything by nothing? the answer would either not exist or be infinite. You do not need this video to understand this.
@@ErokCherokee No, nobody said that. You're probably thinking of "Never argue with an idiot. They will drag you down to their level and beat you with experience." Which people CLAIM is a Mark Twain quote, but Mark Twain never said anything like that in his life. It's ultimately a common sentiment that slowly adapted over time, and it may have roots in Proverbs 26:4
I taught Engineering Mathematics fundamentals, at the collegiate level, and ended up creating a remedial, math course for nearly 2/3rds of these students to help them 'unlearn' fallacies taught in the public, school system. Students are not being properly prepared for the rigors of higher education; They are being prepared to pass tests...
Eliminate school taxes and make parents solely responsible for paying for their children's "education" and the schools would be forced to change their approach.
@@garthornspike3648 that's not going to work. The rich would hog all the better teachers while the majority of us middle/low and peasants would get mediocre lower status, fish (newbie) teachers. The best way is to invest in higher education or outside education from the public school. It's an add on. That way, the student can be ahead of current level. Many Asian parents put more classes like math, reading and etc in the East.
This is is the easiest and most obvious way to prove it too. Which it makes it even more mind boggling that they are just willing to die on that hill. Not to mention the dozens of other ways to prove it. Then there’s some fools in this very comment section that 1/0=1. Incredible.
@@RanOutOfSpac It can!.... sort of... sometimes in calculus. And it technically isn't 1/0, but rather the limit of f(x) as x goes to 0 of say f(x)= sin(x)/xcos(x) Though f(x) in that evaluates as 0/0, and approaches 1. But I can't think of a function off the top of my head that works. And 1/0 still technically isn't 1. The limit of the function is equal to one, which is only sometimes the same.
If I have a pizza. 1 pizza. Now I divide it zero times. What's left? It isn't zero pizzas. It's my 1 pizza. I didn't divide it because 0 means nothing. I divided it 0 times. Can someone help me out here because this shit makes no sense at all to me. It's like if I divide that same pizza once, I now have 2 halves. So I'm at 2 1/2 pizzas. Put them back together and I'm at 1 pizza.
@@Richard-gw2lr If you divide 1 pizza by 4, you get 4 slices of pizza. If you divide 1 pizza by 1, you still have your 1 whole pizza. When you start dividing your pizza by a number less than 1, you begin to bring more pizza into this world from a different dimension. 1 whole pizza divided by 0.5 is 2 whole pizzas. Notice how when you divide your whole pizza by a number greater than 1, you only end up with the same whole pizza but in smaller slices. However dividing your whole pizza by a fraction yields more pizza than you began with. As you divide your pizza by a number that is closer to zero, say 0.00001, you get something like this (1 whole pizza / 0.00001 = 100,000 whole pizzas). Therefore your initial statement "If I have a pizza. 1 pizza. Now I divide it zero times. What's left? It isn't zero pizzas. It's my 1 pizza." can not be true because as you divide your 1 pizza by a number that approaches zero, instead of ending up with your 1 pizza, you end up with a number close to infinity of pizzas. The sheer number of pizzas entering our world will cause our universe to implode into a hypermassive pizza black hole. This is why you can not divide your pizza by 0.
@@Richard-gw2lr You’re treating division as if it’s subtraction. It’s not. It’s a process that explains fractions. I’m no expert, but the easiest way to check your work is to use its opposite operation, multiplication. For 1/0 to = 0 the reverse must be true in multiplication, but 0*0 does not = 1 so it’s not. The fellow above me explains it better too. Division IS weird like that, but it has to be because division isn’t subtraction, it’s the inverse of multiplication and it needs to match. There’s more and far better reasons out there, but that’s best my smooth brain can explain off the top off my head. I’ve seen some great explanations using graphs too.
I remember learning this fact (that you can't divide by zero) in elementary school. The fact that both the teacher AND the principal got this wrong is really disturbing.
They don't even teach math properly anymore from my perspective. Oddly enough I was one of just a few kids that liked proving math because my dad was so into computers, even in the 70s. it was nuts but to this day that old school math is used in my tech job with scripting so I still have interest but I had to show my own child how to do it against the public school process. Education has fallen off the deep end, today 2x2=oppression.
@@Kitsuragi556 As much as I hope you’re correct about this it wouldn’t surprise me that was a true, unembellished story. I went through ALL of elementary, junior high, high school, and college (with a bachelor’s in the STEM area) with a miss understanding of the order of operations because my 2nd grade teacher taught it improperly. Failed to mention that multiplication and division were equal to each other. The same with addition and subtraction. Always thought it was parentheses, exponents, multiplication, division, addition, and then subtraction; Only in that order not the correct way of parentheses, exponents, multiplication/division (left to right), and then addition/subtraction (left to right). I don’t know how no teacher ever noticed/cared Kindergarten to Collegiate to correct me. It took a fricken UA-cam video that I stumbled across accidentally and subsequent investigation for me learn a basic math rule.
For those not getting it. Type it into your phone calculator and you will find you cannot divide by zero. It's clearly something this teacher was not taught.
The math teacher didn't go to the principal to back up her math (unless the principal has a math degree), the math teacher went to the principal to exert her authority. It wasn't about being correct, it was about shutting the parent up.
The audacity to presume one has the “authority” to override reality itself. It’s stuff like that that leads to all sorts of awful things in our world. In this situation, it didn’t matter much as it will probably be corrected in middle or high school. But imagine if it was something of serious ethical importance, and they still refused correction? Attitudes like that which do not care about reality can destroy lives. Here it couldn’t, but the same absurd refusal to acknowledge reality could be a serious danger in another situation. Humanity and civics needs to be developed in education. Without civics and ethics being taught, formed, practiced, and required all sorts of issues are bound to happen which are 100% preventable.
Wow you must be telepathic, to somehow know all that from the limited info in the video. Or are you personally involved deeply in the situation mentioned in the video? I'm willing to be you're straight up assuming many things and deciding a conclusion based on those unfounded assumptions. which makes you as bad as the teacher in the video. :) come down to earth, don't assume you know what's going on.
@@scruffygaming627it's reality the teacher and principle are both wrong. The error was pointed out and yet they double down on asserting something wrong. Why do you excuse it and want to let it slide ? Tolerating nonsense is tearing society apart.
My third grade teacher insisted that it wasn't possible to subtract a larger number from a smaller one, and she made a big thing about it, too. She could have just said that there was something called negative numbers that we'd be learning about in a couple years, but that we wouldn't be learning about them in that class. But no, she had to insist to everyone that it wasn't possible.
Except her class isn’t even close in the end goal. She’s a mere fraction of the entire infrastructure. Better to show students a glimpse of the entire picture than telling them some bs lie which will cause more confusion down the line
@@chucksucks8640My third grade teacher told me abou5 negative numbers when I asked about switching the numbers that got subtracted, which allowed me to mess with them and understand them in third grade
When I was 10 years old, I got into an argument with my 5th grade teacher that rainbows are not just random colors in random order. I kept trying to explain the speed of light and the order of the colors are always the same in rainbows. But she doubled down and told everyone in the class that I was wrong and every rainbow is like a snowflake and the colors are always different in different order. Has she never watched an episode of Barney?
Dude ive had nurses tell me certain drugs are not used for their SCIENTIFICALLY proven purpose but " just get you high so you forget about ______". No understanding of receptor activity or how this substance blocks signals in parts of the brain. Nope it just gets you high. I was stunned a RN a TRAINED nurse knows less about stuff she is perscribing than i do. And we wonder why opioids where an issue? Maybe its cause Humans REFUSE to educate themselves fully before thinking they know something
Generally you are right about the orders of colors in a first-order rainbow. Please take the second order of refraction into consideration where the order of colors is inverted and the intensity is greatly reduced.
To the genius in the megathread who stated that dividing by zero was equivalent to performing no division at all, while agreeing that "No amount of nothings make a whole"--- anyone not not properly acquainted with the difference between an identity element and an inverse element should not be teaching math.
I mean you’re a grown up now, with greater cognitive depth to be able to easily comprehend what is said. Your teachers probably taught you the same way
@@bales1569I've never understood long division through all of my schooling, and never had it taught to me in an understandable (to me) way. Watching this, it just clicked. And I don't believe I am much smarter than when I left high school 3 years ago
@@braydos1578 you actually are you don't realize but most people use basic math almost every day. Don't just put yourself down you should recognize that you are more intelligent.
@@escapegulag4317 Actually, the whole explanation in calculus as far as "undefined" is that it DOES approach both positive infinity and negative infinity and that's why it's not defined. Take 1/0.1=10; 1/0.01=100, etc... 1/-0.1=-10; 1/-0.01=-100, etc... so as both of them approach zero, they'll end up in two different places, i.e., positive or negative infinity. Easy fix to it actually... just rip out the piece of paper and fold it back onto itself, so that both infinities meet at the same point. You've now created (absolute) infinity and negative infinity = positive infinite. Now it's a number rather than a concept and after googling "Riemann Sphere" you can move on to "Wheel Theory" to understand how you can deal with 0/0.
dividing by zero requires a undefined condition outside the pure problem. look at it this way. in a word problem. there is one apple on the table. divide the apple for two people, and you get one half. divide it for one person you get 1 apple. and divide by zero people you get 0 apples when you define how many apples do people get. when you define how many apples are there, you still get one. so, take 0 apples and divide it between two people? you get zero apples left and zero apples for the kids to eat. they are the same, they do not need to be defined. this make sense? for any number to make sense, the problem must be fully defined, and dividing any nuber by zero without context expressed in the problem cannot be solved, because there is no slot for the numbers to fall into.
What a great life lesson. He learns that most authority figures are not necessarily intelligent and just because they are in authority positions doesn’t mean they are right.
I managed to teach myself how to switch between two pens while holding them both in the same hand like that at some point in middle or highschool. The next year tho, I'd completely forgotten how I did it, and I still cant do it anymore.
@@PanoptesDreamsExactly. It did help a lot and the transition so quick there was no distraction yet the color change did make it more clear. Was like a magic show. At first I thought the colors were changed in post with digital editing. Nope.
As someone who struggled with math in my younger years, learning the foundations is extremely important. Mathematic principles compound on each other so if you don't understand the simple concepts, you will never understand the more complex ones. The teacher and the principal were both very wrong, and it is very important that they be corrected for the sake of all the kids that they are teaching.
They wouldn’t be teaching little kids if they ware capable. We respect teachers but that doesn’t make them geniuses, far from that. Anyone who’s average or even slightly below can teach children. Capable children will achieve success regardless. World is full of excuses.
When I was in the third grade I used the verb "trudge" in a sentence I wrote for a grammar exercise, meaning "walk slowly and with heavy steps, typically because of exhaustion or harsh conditions". My teacher took off a point and accused me of making up the word. The word was not in her pocket dictionary.
I remember in 5th grade i learned the proverb "all work and no play makes jack a dull boy" from reading little house on the prairie. I used it in an essay and was proud of myself for being able to include something I learned all by myself. My teacher docked me points and said using that phrase was too advanced for my grade. Same teacher also sat me next to the troublemaker kid to "control" him and scolded ME when the boy cheated by copying answers from my tests.
I think I was in first grade when I was talking about a book I’d read and verbally used the phrase “horse’s foreleg” because I’d learned it from the book. My teacher just looked at me for a second and slowly said, “Yes… horses have… four legs…” That’s the first time I can recall thinking that an adult was dumb for not knowing something I knew.
Damn dude, that's harsh, wish I could have lent you my mother for the occasion, she woulda rattled that teacher outta her socks. Her life would never be the same.
Give her 8 crayons and ask her to divide it into 4 groups. There will be two crayons in each group. Congratulate her. Now take them all back. Next give her one crayon and ask her to put it into zero groups. If she just sets down the crayon tell her that is one group and you wanted her to divide the crayon into zero groups. Did the crayon disappear into zero? No. You can’t divide one crayon into zero groups. It’s IMPOSSIBLE!
yes, so it' s one group of one. not " undefined". it just doesn't work the same as other numerals, ther e is no reason not to declare it an exception to the rule.
@@theCosmicQueen Uh, it is undefined. It's not a group of one. The answer to the crayon question isn't to just put the crayon on the floor or table. The question is asking her to give that single crayon to 0 groups, as in, give it to anyone, or put it on something, or even keep it yourself. It doesn't work. You can't give that crayon to nothing. That's why it's undefined.
This is a very unnecessary conflict blown out of proportion. You'd end up being burning bridges. Yes you can argue if you take 5 apples, multiply it zero times, "how many apples do you still have?" But blowing this out of proportion makes things worse. And thats what Yankees do
I think a good way to describe division is as repeated subtraction, essentially how many times you have to subtract the divisor from the dividend to get zero. If 1/0 was in fact zero, that would imply that zero subtracted from one zero times would be zero, which implies that one is equal to zero, which makes sense when you consider how many teachers this kid has in theory, versus how many he has in reality
I prefer the opposite strategy (which essentially means how many times do you have to add up the number you're dividing for so it will be equalled to the number being divided)
This is what I taught my kids. How many times will you take zero from one until there's nothing left? This should give them the idea that they can subtract forever and 1 still remains. The answer therefore is not zero.
my third grade teacher was trying to tell us that texas was bigger than alaska just because the map she showed us had alaska in the corner, not to scale. it was a real confidence booster proving her wrong
Many people don't realise that maps have to adjust size to be able to coherently project what's on a globe to a rectangle. More people should be aware of that as a common knowledge...
Yeah maps are projections. They are never to scale. There are a few interesting and well designed maps that attempt to show everything to scale though. Not useful outside of that specific purpose though. Although I suppose a globe would be more accurate.
The most impressive part of this video is the presenter's ability to swap colors without thinking. I can't even write with two markers in hand, much less swap then that easily.
My 4th grade teacher told our class that Neil Diamond was the first man on the moon. I told her it was Neil Armstrong, and she made me stand in the corner facing the wall during recess for a full week for being disrespectful. Let's hope she's no longer terrorizing the nation's youth.
As a teacher myself, if there is a question I don't know the answer to when asked by my students, I straight up tell them I don't know and we'll look up the answer together.
Much respect for your willingness to question and check. I had a doc (MD - and you know their rep for having the god complex) one time who listened to my description, flipped open a book, and showed me a picture. "Is this what you're seeing," he asked me. "Yes." I was so impressed. Clear comms. Good info. Correct diagnosis and treatment. Same story, much respect.
@@mikestone5595 maybe because the teacher doesn't know the answer to it. Don't assume teachers know the answer to everything. I personally like when my kids asks questions no matter how ridiculous those questions maybe.
Once while my teacher in high school was preparing the class for the SAT, I mentioned to her that one of the geometry problems had two answers. It was a question where you had to identify which pattern of boxes could be folded into a cube. There was one obvious one and one wonky one that no one else in the class picked. The teacher didn't believe me when I told her the other selection also formed a cube, so the next day I brought a cut out of the pattern and folded it into a cube in front of her and the entire class. The teacher still wouldn't believe that the SAT would make a mistake like that. Some people are just mindless drones happy to be living in ignorance.
Not math related, but still ignorance related. In 2011 I wrote a 7 page biography on Barack Obama for a paper. We were using TurnItIn to check for plagiarism, plagiarism checkers were fairly new. 5% of my paper was paraphrased from sources I used. 47% of my paper was similar to over 50 other student's papers because Obama was a very hot topic, after all there's only a few ways to write "Obama was the 44th president" Anyways she refused to believe I didn't source 50 other papers and paraphrase 1 sentence from each so I got -52% for plagiarism 😒. I feel bad for students who might get false flagged for AI papers today
It's obviously too late now but I would just point out to the teacher all the times in which the SAT has been wrong in the past and been correctly called out by students, not teachers. Veritasium just posted a video about a notable example of it.
The fact you went to the effort to actually make that cube net and demonstrate it shows you're going to go far if you ever take up a STEM subject! You're willing to physically test a hypothesis!
But that would be wrong because disagreeing with the teacher is insubordination. Even if the teacher is objectively wrong, it is morally wrong to embarrass the teacher and put their job in jeopardy. In the real world it works the same way. Especially if you have an advanced degree and you work for someone who doesn't. Helps saves you from getting fired, plus arguing about what diving by 0 gets you doesn't get you to the bottom line, namely making money, any faster - rather it delays it.
@@cryora Where do you live where being wrong as a teacher can put their job in jeopardy? I frequently disagreed and argued with teachers. I was often wrong, but sometimes teachers were too. No one ever got hurt, punished, or lost a job over it.
@@cryorainsubordination? Wow that is a whack take. The teacher is the one who brought her boss into the conversation so, if they get embarrassed or fired it is their own fault.
In first grade, I got a B on an assignment for how I spelled ketchup. My teacher said the proper spelling was catsup. As she went on teaching, I quietly consulted a dictionary, wanting to know if I was truly wrong. I found that both spellings were in the dictionary, and respectfully pointed it out to her. She was flabbergasted, and sent me to the principal’s office. My mom had to come in and talk to the principal, who told her I was correct and would not be punished. That was an early lesson in critical thinking for me.
Actually, catsup is still likely wrong depending on the context. Ketchup is a very legally specific term referring to a very specific foodstuff made with a specific proportion of ingredients. If a manufacturer deviates from the legally defined ingredients, they can no longer legally define their product as "ketchup." "Catsup" is to "ketchup" what "creme" is to "cream." "Catsup" is a ketchup-like tomato concoction (and in some cases abomination) that does not meet the strict legal requirements to be labeled as "ketchup." So, yes it is ketchup, and anyone who tries to tell you that their "catsup" is ketchup is at best misinformed, and at worst comitting food labeling law violations. Just to be safe your teacher should probably be investigated by the FDA, the FTC, the CFPB, and the USDA. It's the only way to be sure ;)
@@sophiedowney1077I feel like you made up some of those letter names. I freely admit I could be, and most likely am, wrong about that, but it just feels made up.
@richardwilliams3080 Food And Drug administration, Federal Trade Commission, Consumer Finance Protection Board, and United States Department of Agriculture, respectively.
She, like many educators today, is disenchanted with math, clearly. The best solution is to fill in the necessary gaps with your child. I know we WANT all teachers to teach well, but this isn’t the land of imagination, so the effort will need to come from the parents, overall. I am so lucky I don’t have kids! 😂
Actually, the answer is "undefined" per Google. Also, doing the math on my mini calculator (1 ÷ 0), the answer is 0 (zero). 1 ÷ 1 = 1. So, we'd not get the same result for 1 ÷ 0. At any rate, the better answer here - probably - is "undefined."
I didnt understand this concept until I heard somebody say that 0 is a placeholder for "nothing". Then I reread the question as "one divided by nothing." How many times can nothing fit into 1? No answer.
That’s a great explanation! I didn’t even know that. That makes a ton of sense! So 0 isn’t an amount; instead it represents a complete absence of anything that even could be quantifiable. Have I paraphrased that accurately?
In highschool, I had a math teacher who taught AP and was generally a very good teacher, but didn't know pi could be calculated using a circle. At that point I understood secondary school teachers aren't the real deal when it comes to knowledge in a particular field.
In high school one of our teachers that had a major in Geography tried to tell my Indian friend that he was European. She absolutely would not concede that India was actually in Asia. We still laugh at her
She was trying to say that they're "caucasian" rather than "asian." This is based on the old idea tthat there are basically 4 categories of people. White, black, asian and other.😮💨
😂 I had a similar argument. My daughter was confused by her math because they kept swapping the order of operations. So I told her she could reorder things and it’s usually fine. Ex. a+b=c is the same as c=b+a And her teacher flipped, laughed in my face and told me you can’t do that and it ruins the math. 😂 wtf?!
@@sanjayrajagopal7416Addition and multiplication have the commutative property, but not subtraction and division. 2+3=3+2 and 2x3=3x2, but 2-3≠3-2 and 2÷3≠3÷2.
My younger brother once had a teacher who asked the class to name units of distance, and my brother offered "lightyear" and was told that it was a unit of time, not distance. He mentioned it to me after getting home that day, and I told him that he was right, but there definitely is a common problem where teachers will simply state whatever sounds correct to them as if it were absolutely true, even if it's on a subject they know less than nothing about.
@@joefaller4525 Just like many people can't get past the hour part of kiloWattHour. When you add in that 1 Watt is 1 Joule/second they are completely lost.
My wife is a teacher, currently taking classes to become a principle, so I asked her about this to get her perspective as both a teacher and a prospective principle. Here is her response. Unfortunately, we have to teach kids based off the TEKS that are decided by politicians. The standardized tests are based off these TEKS so it is in the childs, and the schools, best interest to learn that anything divided by 0 equals 0 because that is what is going to be on the tests. The teacher could have handled their response to the parent better, but unfortunately we are not allowed to directly tell a parent that we have to teach the students based off the TEKS. As a principle I would have told the parent that the concept of "undefined" is something that is taught at a higher level and that the teacher has to simplify certain concepts so that they can be grasped by ALL the student on that level.
When my eldest daughter was 8, a supply teacher asked the children what the sun was? She put her hand up and said “it’s a star miss” the teacher not only told her she was wrong, but had the whole class laughing at her for getting it wrong. It took me ages that evening to convince her that she was correct all along. This is where education can be dangerous.
@@alanhaynes9672 Well, I guess if you limit the scope of the investigation to our solar system, she could be right…. Sorry for your child’s embarrassment for being right, but a good lesson from Twain “Whenever you find yourself on the side of the majority, it is time to pause and reflect.”
you had a stick you just didnt do anyhing to it , so you still have a stick. 1% 0 is 1 0% 1 is 0 you had nothing and still have nothing . caint divide nothing into parts of something..
Well, you actually can divide by zero (in a way)... you just have to be specific on how you'd want to do it - else you'll get "undefined" as an answer. If you form the derivation of a function you pretty much divide by zero (while forming the limit), but in a very specific way.
@@lythonoise Zero can be divided by anything (except zero) and always give out zero: I have zero cakes and I keep those for my self (divide by one) = I still have zero cakes. I have zero cakes and share them equally with 6 other people (divide by seven) = we all have zero cakes. Problem starts when you have something and try to divide by zero. If I have one cake and keep it to myself then I divide by one, if I share it with those other people then I divide by seven... ...but how do i equally distribute one cake to zero people?
It's never a good idea to take stuff at face value, so it's good you're expanding your purview. P.S. don't take this at face value. Ponder it yourself and reach the same conclusion.
@@Nathan-jh1ho that's not really a good comparison. Each person could have 0, 13, 10^10^10^7, or anything, and nothing would change. However, in truth you would observe it going to ∞, and your comparison fails to demonstrate the divergence.
When my family and I emigrated to the United States from Germany in the 1970s, my American teachers didn't believe that a 7-year-old German kid could do the additions, subtractions, multiplications, and divisions in the head without writing out the exercise and the process. That was how I was taught in Germany prior to our emigration. Same with the cursive handwriting (I was only kid in the entire elementary school who could write in cursive handwriting with fountain pen as it was norm in Germany). Gradually, i started to hate doing math exercise and developed the aversion toward the math classes. That is very tragic and unjust how the teacher's attitude can cause the lifelong damage to the students.
This is probably the standard throughout all European countries that kids are taught to do basic calculations in their head during their first years of a primary school.
My daughter went to a private school for kindergarden and half of 1st grade, we had to move so she had to go to public school.. she could read and write in cursive and do math in her head the class she was in was learning CAT SAT. I guess that was a sentance for the class to learn that week. The teacher told my daughter she had to learn like the rest of the class and couldnt read books from the 3and 4th grade section of the library only the 1st grade section same with doing smaller math and she wasnt allowed to write in cursive. After a few meetings with the teacher that didnt go so well.. that is what led us to homeschooling!
I taught pharmacology at a nursing school. One day I decided to take a master's course in pharmacology, just for the sake of it and to see what new material I could pick up, at a university. My very first test I scored a 59. I was shocked. No way, I scored a 59. I know my pharmacology. I went over the test and wrote to the professor explaining why my wrong answers were actually right and cited medical textbooks. Needless to say, my score of 59 was changed to 98%. The scary part is that there are teachers out there teaching that do not know their material and they are wronging right answers. At a college level, that is very detrimental to the students considering that it impacts their whole future. Maybe that is why we do not have smart people running the country, because all the right ones were wronged.
Good working theory. I remember being very frustrated with this as a kid too, a lot of language teachers don’t know what they’re doing either, just like math and science teachers unfortunately.
To be successful in America, all you need is to be confident, convincing, and loud. Helps to be good looking too. Intelligence barely plays any factor.
Less so at the college level, but often teachers are not given a choice of what they teach but rather have to teach what nobody else wants or administration doesn't have a specialist for. At least where I live, nurses make far more money than teachers do and even more than all but senior professors. So where is the incentive? Society does not value teachers much these days. I wouldn't become a teacher even though I realize how important it is.
I remember my daughter’s biology teacher once told her that corals are plants. We talked and she doubled down and also got the principal involved. In my experience a lot of teachers just make stuff up instead of saying “I don’t know” or looking it up and then their pride gets in the way. This is why I really respect teachers who love what they do and are really interested in their students’ learning process instead of just going through the motions.
I knew of a teacher that taught that the earth was flat, after watching the Apollo landing on TV. Teachers, like parents, are fallible. Thank goodness the vast majority of teachers are competent.
My high school biology teacher taught us the parts of the eye: the black dot in the middle is the pupil, the colored part around that is the cornea, and the white part around that is the iris. If I hadn’t learned the proper parts, I would have been so confused when Stargate:SG1 came out and they’d “close the iris” to stop someone from coming in.
Situations like that are teachable moments. If you don't know, teach them _how_ to find out. "I'm not sure. Let's find out together (but without Wikipedia)."
Back in 1970 my mom worked for the assistant principal at the high school. One day a kid who usually came in because of causing trouble came to ask my mom for help. He said the math teacher couldn't explain & help with a problem & he was really trying to do his work so he could get a job he wanted. My mom got the advanced math teacher to help him. That teacher said the problem was the other guy was an education major. He said more and more teachers were getting a degree in education instead of getting a degree in a subject then taking the extra classes to get a teaching credential. Think how much things have gone downhill in our schools since then.
Some of my favorite teachers when I was in school were the ones that weren't afraid to say "I dont know" & then would look into the information in question. Then I would learn with them.
I was very fortunate to spend all four years of high school at a school where most of my teachers were excellent. My teacher in Honors English 9, Mrs. W., was not especially fun or warm, but she also wasn't mean-and her basic attitude toward knowledge and learning was right. About halfway through ninth grade, Mrs. W. stopped teaching, for some reason (illness?). Her replacement for the rest of the year, Mrs. E., was the mother of one of my schoolmates. Mrs. E. was no dummy, and she seemed nicer than Mrs. W.-but her attitude toward knowledge and learning was pretty lame. After the end of ninth grade, I was happy to be done taking classes from Mrs. E. By the end of twelfth grade, I'd had more opportunity to notice one of the particular things wrong with Mrs. E's approach. For all four years of high school, I'd taken some classes from Mrs. H.: she taught four years of French (of which I took three) and Journalism and A.P. English (for which I had her) and Shakespeare (ditto). For some reason, not even halfway through that school-year, the Shakespeare class was moved: Mrs. H. stopped teaching it, and now Mrs. E. taught it. (Maybe they knew Mrs. H. wasn't going to teach many more years, and maybe they wanted some overlap in which Mrs. E. could learn to be a Shakespeare teacher while still having Mrs. H. around for guidance.) The point of my ramble here is the contrast between Mrs. H. and Mrs. E.: • In _all_ the classes I took under Mrs. H., if anyone asked a relevant question (or even an only mildly related interesting question) and Mrs. H. didn't know the answer, her response was basically "That's a good question. I don't know. Let's find out"-and then we'd start digging in the books in her classroom, other kids would chime in with ideas, maybe someone would run to the library to look something up there. • In _both_ of the classes I took under Mrs. E., if anyone asked a question and Mrs. E. didn't know the answer, her response was basically to toss you a not unkind combination of words and facial expression that nonetheless said "I don't know. Who cares? What a strange person you are, for wondering something like that", followed by something like "Let's get back to the text." There is value in staying focused on the task at hand-but, as I'm sure you can tell, I preferred (and still prefer) Mrs. H's approach. Sitting in Mrs. E's class was not torture, but it was only something to tolerate (and to avoid if you could)-whereas Mrs. H. was a pleasure, for four years.
As a middle and high school teacher I have no issue telling students that I dont have an answer, or admitting that when I am wrong. We have to model good behavior if we expect students to learn how to be adults.
I'm sorry to say that most public school teachers are modeling insanity and intolerance to our children and they are learning it very well judging by how the current generation is looting, rioting, burning, and beating people in the streets.
one ofbmy teacher was like that "hey, i dont know the awnser to your question but i'll search it" and then was always coming back with it or searching it with us if we had time :)
3rd grade teacher here, I have worked in various schools back when I subbed all the time. I have seen countless teachers who were pure ego, teaching nothing, but thought they were the masters of the universe. I try to give my students the tools to do well in higher grades and a happy childhood (2 things I wish I had been given). I hope when mine leave me they get a good teacher like yourself.
ive always been really, really...reeeeaally bad at math. and hated attempting it because of that, yet always liked it in general, as an aspect of existence, etc. anyway, the way you explain it, i actually found myself engaging. i'm still stupid, but i donno, the mixture of your calming demeanor, and teaching skills are splendid, and i am now a subscriber. probably your most math illiterate subscriber, i can almost guarantee that.
I feel like these types of Reddit stories are just made up, and the idea behind it is to get credit for how intelligent they are for knowing it's not 0 but undefined. But maybe I am just pessimistic.
Best thing you can do when dealing with delusional people lol. You know parents like these will file a complaint and this way the boss knows exactly what’s up right from the start
I'm not supporting the teacher, but even I would tell the kids that it is zero.... Because they don't have to understand it at their young age, if you stuff their head with all the concepts of math then they will start to hate math even before trying.... A genius in math can become scientist and professor teaching 100z of students, but he will be a terrible teacher for young kids when they are still learning numbers..... Bcs he doesn't help them understand, but he will only make it worse....
@@ryuk4142 You shouldn't tell them that because it's wrong. Any finite number divided by zero isn't zero. It's infinity. It is quite literally the opposite of zero. Besides, if you teach them that multiplication and division are inverse operators (which they are) it will confuse them more when you at the same time tell them that said inverse operators will return the same result.
I once got a question wrong on a science test concerning states of matter, we had to assign different things to their states, like water is liquid, a log is solid, etc. One of the objects on the test was fire, and the "correct answer" was that it was a gas. It was second grade, and I didn't know to explain to her that fire was a chemical reaction, but she marked it wrong because I said "none of the above". We really need to work on our education system.
Well, it is true that what we call Fire is a chemical reaction producing heat. But in the most common sense, the fire is mostly conducted in gaseous (or near gaseous) form and the result is mostly in gaseous form. I think that this answer is mostly correct, if we ignore few facts and how exactly the question is asked...
@@Nrt2Pnt0 No, it is not entirely plasma yet, albeit close to these energy levels. In some parts of the fire, where the temperature(actually energy, as temperature is byproduct) is high enough, a plasma state can occur.
I worked in tile sales years ago and a lady needed some tile and after I did the math on the calculator for how much she would need she tried to correct me and got snobby saying she was a teacher. When she realized she was wrong she said she didn’t need help anymore. The second hand embarrassment was strong.
@@Azereiah He's not wrong though, his example fits perfectly. Teachers will say a bunch of stuff that is factually wrong, due to ideology/stubborness/or whatever other reason.
@@12345678bobster His example fits perfectly? The discussion was about teachers getting math questions wrong and not wanting to admit it, and he brought up gender identity issues. How is that a perfect fit? Are you over there telling yourself you aren't pumped full of ideology, bud? What a laugh.
As a trained course supervisor in a past life, one policy we were taught was to never hide a mistake from the student. Reason: a mistake uncorrected in the student is then potentially repeated countless times by the student in application, leading to bad results. NOT acknowledging the error and correcting it is the academic equivalent of crippling that student, potentially for life, on that lesson. It is an evil act. Teachers that would rather protect their egos than do a little research to ensure their student gets the most out of the lesson have no business teaching anyone.
There were a few cases in my childhood where I still remember when a teacher gave inaccurate information and I corrected her on it. Needless to say, those acts lead to her spending the rest of the school year bullying me in front of the other students. And when I did correct the misinformation? The class was told I was in the wrong. To this day I still resent that teacher and I'm damn near a senior citizen.
@@dickjohnson5979 It has been a while since I have watched game shows, but I do recall this very thing happening. And always after a commercial break. I suspect either a contestant questioned it or one of their experts reviewing the game would question it. And would then follow it up. I've recall the game show evening giving credit if the answer was too vague and acknowledging a poorly worded answer lending to doubt.
I used to substitute and was certified in math k-12. The amount of teachers that would teach the kid the wrong thing was unbelievable. They should be ashamed of themselves
I’ll be 49 years old in a few months. When I was a kid I could not wrap my head around long division. I could always come up with the correct answer; just couldn’t explain it on paper. My 5th grade teacher decided that I was just refusing to put out the effort to show my work and disciplined me by putting my desk against the back wall of the classroom facing the opposite direction as everybody else’s desks and would make me stay at my desk during recess and lunch. I was traumatized and shamed by the experience and never learned long division. I use equations all the time in my work, but I have all of these hacks to avoid long division. I’ve even been afraid of needing to know it and embarrassed because I don’t. Until I watched this video today. I totally get it now. It’s so simple! Thanks, man.
i'll be 49 in five days and in my school district, that teacher would've been a goner for even saying something that humiliating to a kid. geez, my *mom* would probably have beaten the tar out of them personally. did you go to a crappy abusive christian school or something?
Long division is functionally useless. It's a conceptual dead end, a calculation heuristic developed so people don't have to comprehend the principlesat play in division. Better to skip it and learn algebra.
I taught my students repeated subtraction first. They could reason out answers even when the algorithm for long division got confusing (fractions and decimals and money). Long division is the nonsensical shortcut we use that should never be taught until kids understand decimals beyond hundredths.
That just feels like a weird thing for a basic math teacher to get wrong. I remember the longest running joke in computing being the disastrous consequences of making a machine divide by zero.
In Canada and USA at the third grade level there is no such thing as a math teacher. There is a third grade teacher that teaches third grade level subjects including math.
@@TristynRusselodepends on country and region. In third grade we definitely had math. It would seem weird to me if someone would not get taught math in elementary school.
@Max_G4 Probably depends on country. Where I live, we have a single teacher for the 1st 4 grades. Of course she's not a math teacher, but she teaches math. Along with native language, geography, biology etc.
@@Max_G4 I never said that third grade students are not taught math. I said that they don't have a specific math teacher. They have a general third grade teacher that teaches all subjects. That by definition, is not a math teacher, It's a third grade teacher.
We always learned that to check our division, we would multiply the answer by the divisor, and should get the dividend if our answer was correct. In the instance above, the dividend is 1, the divisor is 0 and the answer is (incorrectly) 0. Multiply 0x0 and you will never get 1.
@@Ryarios - I remember when there was a software glitch in a program (maybe something with Microsoft) that you could get extremely large values of 1 (I think). It's been probably close to 30 years ago and I'm getting old, so I probably am not remembering correctly. I tried to find any references to it, but it was in the earlier days of the internet.🤪🤪
@@azurnal7573 - No, because division by zero is meaningless. As explained in the video above, most other commenters, and the rules of mathematics. Try not to be pedantic. It's not a good look.
@@frankhurst9665 @frankhurst9665 You used circular reasoning then. To summarize what you said: 1. 1/0≠0 as dividend= quotient × divisor. If divisor equals 0, quotient × divisor does not equal to the dividend, therefore division by zero is meaningless. 2. 0/0 does not apply to the above formula as division by zero is meaningless.
This video reminds me that in second grade, my teacher was asking the class to share the name of any amphibian they knew of during a lesson. Having owned a book with many examples amphibians in it, I answered 'newt' with confidence. Instead of admitting she didn't know what a newt even was, she told me very flatly and with a frown on her face: 'No.' Thing is, newts very much exist and they ARE classed as amphibians. I knew something a teacher didn't when I was eight years old and she couldn't handle it.
At the beginning, individuals go to school, but by the time they finish, they become a flock of sheep (except a few strong minds). States and countries prefer not to have thinking people, but rather mindless yes-men who are merely taxing, robots. (sorry for my English, I try to learn this language)
A similar thing happened with me and my chem teacher. We started learning organic chemistry, and I was so bored by it that I didn't pay attention. I instead learned it from the internet at home. Thing is, the teacher was simplifying the chemical notations, so the "zig-zag" notation that's been used in chemistry for ages wasn't what she taught us. We had a chem exam, and me, being a dumb smartass, thought nothing of it and used the "correct" notation instead of her simplified one. I got an F. She told me "my" notation doesn't make any sense. I then, in front of the class, told her she doesn't know basic chemistry. I was sent to the principal's office for it. Long story short, I had to write a 2 page defense for "my" method with citations to have my grade corrected to a B (I hated chemistry, as you can imagine, no way I was getting an A) and still had to apologize to the teacher for undermining her authority in front of the whole class. This was like 15 years ago and I'm still a little salty about it - at least I got the chance to redeem myself.
Teachers are NEVER wrong 🙄 When my daughter was 7 she wrote a story about pirates in which she used the word "pistoles" several times (a pistole was a gold coin used in Europe in the 1700s) in each case the teacher had crossed through the word in red ink and wrote, in block letters, PISTOLS!! My daughter was obviously upset by this and together we questioned the teacher. She said "Well I've never come across that word before!" to which my response was "I'm sure that there are many words you have never come across before such as 'sorry' and 'apologise' but there are such things as dictionaries!" My daughter was changing schools at the end of that session so we had nothing to lose!
@@WalintHUNthis is some wild statements to make. If you wanted mindless sheep and yes men you wouldnt teach them at all. The education system is flawed but to pretend its created by the state to keep us from thinking is ludicrous fear mongering that only the feeble minded would participate in
Only of they got an answer that made sense. Unfortunately, most of the people who asked this just didn't want to put in the effort. The classic example is people who complain about credit card debt, saying they weren't taught this at school: my response is "your high school math teacher never showed you the compound interest formula?"
@@MySkilletfan honestly I think I was the same way lol I honestly don’t remember the last time I did it but I feel like it was like freshman, maybe sophomore year… maybe even before that… after that I was in like AP calculus and physics and stuff where we were always allowed calculators.
Just a couple days ago, I was correcting a "language" teacher... And then again. And I just concluded "he must be primary school teacher" (aka generic knowledge)... And bam! I googled him, indeed not a "language" teacher.
@@RacingAntthat's not university lvl math. You don't go much more basic than this. Any adult human being should know at least this much. Unless they are born with mental illness.
The answer is NOT 1. Dividing by 0 is not the same as “do not divide”.
Please see 2:46 again. 1 divided by 0 is undefined because we can’t have a number that multiplies with 0 to get us 1.
Rubbish. The answer is 1. Divide 1 by nothing, and you end up with 1, because it's undivided. Zero equals nothing.
“Math is a tool to solve problem in reality”. No, and thanks God it’s not that. It’s ALSO that, but not all knowledge derives from a practical problem. We can use reason and create math just for the pleasure of it, and sometimes what we built just as an exercise get used in a problem from reality
I'm horrible at math and even I remember "undefined". We are in serious trouble😮
@darrenjpeters it won't work on a calculator it says can't divide by 0🤔 so 1 divided by 0 is 1 because it's not been divided by a number
In simple terms if you have one thing and nothing divided it then the same thing still is. Mathematicians like to make up their own stupid shit to reason the fact they cannot figure out how the universe is made by numbers(because they are not God)
I had to do a book report in the 2nd grade on an animal, I chose the Tasmanian devil. The teacher yelled at me, ridiculed me, and said it had to be a real animal, not a cartoon. I went to the encyclopedia and to the principal she made her apologize to me me. She was not happy.
Reminds me of during the ticketing process for the Atlanta Olympics, a ticketing clerk was unaware that New Mexico was a US State and told the purchaser that they had to order tickets through their home country. "old Mexico- New Mexico....you have to order from your own country.."
@@jeffreyrichard2575 the amount of stories I’ve seen of people who don’t know that New Mexico is a U.S. state is alarming
With Google so handy….please look up and verify before you speak😊
@@qwenqwen1476 Huh? This was before Google.
@@qwenqwen1476 Better yet, get an actual education and KNOW THINGS instead of using Google as a crutch.
Is no one else impressed that this guy can effortlessly alternate between two markers at the same time in the same hand?
I am impressed, but you must be new to his channel because that's basically his thing and where the channel name comes from (Black Pen Red Pen -> bprp). It is indeed quite satisfying and I recommend you to watch some of his more advanced calculus videos where this skill is displayed in full potential.
@@georgegkoumas5026I do the same but with pen. It hurts but the good kind.
It's an acquired skill. Spend enough time at a whiteboard, and you'll find yourself juggling markers with one hand. It's not terribly different from the skills we see older generations use with Blackboards.
@@meerak915, black boards require significantly more pressure to make a readable mark, and colored chalk is less common than colored markers. I have absolutely never seen anyone handle more than one piece of chalk at a time (unless the were using a specialized tool, such as for drawing music staves), and chalboards were still being used when I was in school.
I'm more impressed by the enormous stock of markers in the background
The actual answer to his question is: "Move your son to another school, asap."
The actual answer is "unplug your computer and spend time with your kid, and stop relying on everyone else to raise them."
@@QQnowQQlaterYou're awfully judgemental of someone who you know nothing about.
quick post it on /r/AITA instead of seeing the tree from the forest.@@TheOnceandFutureJake
@@QQnowQQlater I hope you have no kids.
@@QQnowQQlater Take your own advice. Get offline.
I prefer "Invalid Operation" vs. "undefined". "undefined" implies that there is a value but the value is undefined, where "invalid operation" is more specific in that you can't perform the operation. Yes it's splitting hairs.
I would say “dividing by 0” is an “invalid operation”. On the other hand, the equation 1/0 = Y is “undefined” as “Y” has no definition. It may be helpful to plot the equation 1/X = Y and look at the area around where X approaches 0. As you approach from the negative direction Y approaches -♾️, and when you approach from the positive direction Y approaches ♾️. So the function 1/X = Y is not a continuous function and is not defined (undefined) at X = 0. This is where the term undefined for 1/0 comes from.
As a math teacher, this hurts me a lot... What hurts the most isn't the lack of math knowledge though, it's the fact the teacher refuses to admit that they may not know something, and perhaps learn from it... I teach senior mathematics and almost every week I get asked a question from a student I have no idea of the answer to. Imagine if I just came up with answers and refused to change my mind because the "student can't possibly know something I dont"! I'd be a horrible teacher! Instead, I admit I don't know it, and either work it out with the student, or ask them to find out the answer and teach me something!
I feel like as you move up in grade levels math teachers become more understanding of their errors / mistakes, especially since the concepts become a lot more complicated. My algebra and algebra 2 / pre-calc teachers would always mark off points for me without a second thought even though I would do the problems correctly, just not their method. Now with my Calc 3 teacher and my BC Calc teacher they would always be understanding and mess up at times. As you go up in math level teachers understand how complex math is more and more, so I think thats why many elementary school math teachers will do this sort of thing: they don't understand the higher level stuff
@@Thowe "just not their method" You have my sympathy. That always pissed me off.
Sounds like you are a good teacher. I am a university maths professor. The more I do mathematical research, the more I understand about how many things there are that I don't understand, but I enjoy learning new things all the time. I particularly like it when a student points out a mistake I have made, because then I know that someone understands and is following my argument. As I have taught for many years, I rarely get undergraduate questions that I cannot answer, which makes it less exciting in some ways. With graduate students it is completely different: more like a joint endeavour, approaching a problem where we don't always know what the answer will look like, or sometimes, we don't even know if there is an answer!
I am a teacher too. And I make mistakes, sometimes. And I used this opportunity to teach my students how to avoid making the same mistakes. To err is human. We all do that. It is just some doesn't choose this opportunity to grow.
When my youngest son was in high school taking AP algebra II, his techer did not understand the material. She would count some of his work wrong because the answers in the teacher book were wrong. He would have to prove to her that the book had the wrong answer. Unfortunately this happened more than you would expect from a school book publisher.
Mark Twain quote: "Never argue with an idiot.
They will drag you down to their level and beat you with experience."
"Do not engage in a battle of wits with an unarmed person" is another one I like
Knowledge and wisdom have limits but stupidity is truly boundless
@@Vasu_Polu You are so correct...
(TRUE) Knowledge and wisdom is BASED on absolutes...
Example: Man and Woman is an ABSOLUTE...
Stupidity is based on ignorance:
Romans 1:22 Professing themselves to be wise, they became fools... (The Bible)
“Never Argue With a Fool, Onlookers May Not Be Able To Tell the Difference.”
"Never argue with a pig. You'll both get dirty but the pig likes it."
When my kid was in grade 1 or 2, the teacher taught them 2 - 3 = X (the letter, not as in algebra). When she had asked the class if it is possible to do 2- 3 my kid was the only one who put up her hand to say yes you can, and was told she was wrong.
I emailed(correction: wrote a note to) the teacher saying I understood that she didn't want to teach kids about negative numbers in grade 2, but that telling my daughter she was incorrect was not ok.
The next day the teacher went over it with the whole class and told my kid in front of everyone "you were right and i was wrong" and "you guys will learn about this next year". To this day the whole thing ended on a positive note and was a positive experience for my kiddo. There were no hard feelings.
Ugh same. There is so much crap being taught during the first two or three years in school. I remember being told that a small number minus a biggre number is unsolvable. Not tricky, not something that we learn later. Just unsolvable, period. I got scolded for naming letters of the alphabet by their names as my parents taught me. But instead of "Ah, beh, tseh, deh,..." in school I had to say "Ah, buh, tssss, duh, ...." Or else. It was fricking annoying. And ever since back then up to now, I never saw a reason to pick up my crushed respect for elementary school teachers.
I can see why they might have wanted to avoid explaining what a negative number is, but the modern way to teach little ones is with number lines and creating a negative number by "jumping over" the zero would have been easy for the teacher to demonstrate. Much better than outright saying your child was wrong.
Teacher fucked up on the initial situation but seems like a good teacher.
We had something similar with my daughter's teacher in primary school. My daughter is on the autistic spectrum and a lot of things were difficult for her at school. In maths she struggled with addition and subtraction. I spent time with her one weekend, using the classic column method (units, tens hundreds etc) and she got it almost immediately. She was calculating very large numbers easily and went to school proud with what she learned. Despite having the right answers the teacher told her she was wrong. At parents evening the teacher told me I was wrong for teaching my daughter that way because that year was all about number lines. I blew my stack. Teaching so rigidly could have set my daughter back that year and I'm glad that she was able to find a method that worked for her. That was a long time ago; she got a B at GCSE maths and has a science degree!
Why was this even a question asked of kids that age?
Pretty simple to deal with it, don't mention it in the first place, and if any kids ask, tell them they will learn in more advanced classes
My brother once told a cool story to his 6th grade teacher about how he caught a preying mantis over the weekend and watched it fly away when he let it go. The teacher told him to stop lying because mantises can't fly. That day during their library time my brother printed out some images of preying mantises flying and showed it to his teacher all proud. He got a detention for wasting paper and ink.
What a horrible teacher:(
petty teacher. Probably the same type of person to downvote everything they read on Reddit
This type of behavior from teachers is dangerous because kids can end up becoming disillusioned and not trusting any teachers and become rebellious while sabotaging their own education. I remember resenting teachers after my kindergarten teacher got into trouble for beating me until it drew blood. I carried that hatred all the way through up to high school.
@@woahhbro2906 Kindergarden teachers beating you up?! That's untolerable!
when i was in grade 5 i spent rainy days drawing diagrams i found in our encyclopedias, my favorite was the inside of a high pressure sodium bulb, it reminded me of a space ship or lunar module in miniature.
one day during recess i found an actual real life high pressure sodium bulb behind the school in a landfill area! it was still in the cardboard and new, i was so excited, i imagined removing the glass and mounting it on a piece of wood for display, i was so excited!
my 5th grade teacher saw it in my hand and took it away from me ,when i told her it was a high pressure sodium bulb and i made a diagram of one at home, she yelled YOU HAVE SUCH A VIVID IMAGINATION ! and acted very angry and stole my find.
i had never heard the word "vivid" before and it caused me to pause, (making a mental note to later look that up) but i felt like she was calling me a liar.
i told my mother and big brother when i got home and my brother said it was worth $40 and she probably took it to the electric company , my mother didnt support me or talk to the teacher or anything.
that teacher was very violent and beat me with a wooden paddle once a week all school year. her name was Mrs. Carter in hobart indiana at ridge view elementary school.i learned nothing at school that year(but i did at home!) i lost all interest in school after that but i quit at 12th grade and went to night school in merrillville indiana and graduated early from there since i only needed one more credit.
My son has a tee shirt that says, "It's all fun and games until someone divides by zero."
😊he must like computers
Lmao nice 👌
Nerd
I need a shirt like that 😂
Well 1 / 0 is infinitely if you’re talking about limits and I definitely enjoy limits but that’s not a third grade level. 🤓
I remember having a science teacher in elementary school and we were discussing planets, and he mentioned that only saturn had rings. We had a small book about planets at home that had photos of uranus and neptune having rings as well and I brought that book to school and showed him. Instead of insisting on what he said, he smiled and told me it was probably a new finding he didnt know about and corrected himself. Until this day, I think this encounter w this teacher enabled me to speak up easier.
that’s so sweet :) it makes me happy to see adults encouraging kids to ask questions. as you said, i think it helps them be more capable of being able to speak up as well as critically think as they get older. if i were that teacher i’d be happy that one of my students was that attentive to still be thinking about it after school
I remember when it was discovered that the other gas giants had rings. Prior to that, only Saturn was thought to have rings.
That is a great teacher. We need more like him!
Out of curiosity, how old are you? I’m 51 and we were taught the giant planets all had rings, which I assumed was known for awhile. But I see Jupiter’s ring wasn’t discovered till 1979
@@spidey1z I'm in my early 30s, but the education for elementary schools here aren't very updated back when I was studying. I was lucky to have supplementary materials my parents gave us when we were interested in certain topics.
Even my calculator knows this. If I input ONE divided by ZERO, my calculator responds with "Math Error" - but if I input ZERO divided by ONE, it correctly displays ZERO.
Windows calculator says "Cannot divide by zero."
My phone calculator says error so it is 0?
@@TheDrizzle404android says the same thing
If your calculator is smart enough it will give you the actual answer, undefined.
@@TheDrizzle404 my android phone does the same thing.. lol
The actual answer is “report them to the Board of Education”
I taught Algebra 2 before I retired several years ago. We were discussing a unit on Matricies and how to manipulate them. One day, a young lady raised her hand and said that was not how her father, a mechanical engineer, showed her how to do it. I could have said, her father was wrong, but, I asked her if she would like to come to the White board telestrator and show us all how her father taught her. She was reluctant, and I assured her she was not in trouble. She came up and did a wonderful job and provided the students with another way to rackle the problem I had not thought of. I thanked her and told the students I had learned something I had not known and it gave the students another way to solve that type of problem. I noticed the principal had slipped in half way through the student's explanation. She asked me later if I always have students help with the teaching, and I said yes, when the situation presents itself. She said, "You do know that's called peer teaching/learning, right"? I told her that's what I had learned in my Master's program and made it part of my Master's Thesis!! Nothing wrong with admitting you might not know everything as an educator!!!
You have effectively taught me something about Pride. Ego only makes you a weaker person not a stronger 1
Thank you for being a true educator when I was very young and at about 1st grade lvl I was punished for using my photographic memory to learn math. It destroyed my confidence and put me behind a wall I've never been able to get past. I gave up on traditional schools at 17 and got my GED in 1985 I got very high grades in all except math. I did pass in top percentile in the other subjects. Math not so well. It still hurts so much. What could have been. Especially in science.
Wish my teachers were like that. I got detention for correcting teachers (history) every year they talked about something not in the books and every year they got something wrong. Got alot of detention for it even after I showed proof
@@br4524 A photographic memory is a highly valuable skill and should be celebrated. Unfortunately, math is hard, and sometime our best skills interfere in learning other skills. Just look at any brilliant person that has ADHD. They tend to excel early and struggle later.
I once got sick and missed a lesson on long division, then came back to school and had a long division test. Got almost all the right solutions, but didn't actually use long division, so I failed the test. Luckily, that teacher had been a great one, and took me aside to actually teach me instead of punishing me. Too often, punishment is just assumed to be a valid teaching method just because it sometimes is, and turns out completely pointless.
@@zGoodMan187z"Your ego is not your amigo"
This is a great time to teach your child that teachers can also be incorrect and to always keep an open mind and question the experts! Thanks for an amazing explanation!
Clearly this teacher is not "the expert". It doesn't take any type of expertise at all to know you can't divide anything by 0 (aside from this video explaining it very well all you have to do is just think about it for like 5 seconds). The teacher and the principal are idiots.
Most teachers learn the lesson plan just before the class and forget it after the class is over. They just regurgitate what is on the lesson without critical thought or really knowing the subject. There was none of this undefined crap when i was in school. 3 divided by nothing at all is still 3 because you did not do anything to it to divide it. Same with 1 divided by 0 which is 1. I was taught any number divided by zero is always going to be that number as it cannot be anything else. To say it's undefined when it really is easily defined is Really Dumb.
@@DivergentDroid I mean that's not really...how it works. Undefined isn't a new concept, you just weren't taught it before.
@@TheRythimMan I don't care what you say because you don't have the mental capacity to know how stupid it is. If you have 5 fingers and you take nothing away from them meaning you do not divide or split them at all, you still have 5 fingers. It's the exact same as dividing by zero. It's essentially telling you, you are not dividing anything at all from anything. Now I do understand why you cannot see the problem, you are taught by your uneducated teachers that you live on a sphere in a vacuum that has a sphere shaped atmosphere that fails to behave as gas laws and the laws of thermodynamics tell us gas must behave. You already believe so many lies you cannot see a fact in front of your face.
@@DivergentDroid Someone with a brain🎯😎☕
Dividing by zero is undefined in math. It doesn’t yield a meaningful result, as there’s no number that you can multiply by zero to get a non-zero number.
In fairness, I might have had an easier time in life if I knew from an early age that people in authority are often wrong, and if I had been taught how best to handle that situation. Trying to correct them is seldom a winning strategy. An incident like this could be a teachable moment.
yeah, unfortunately many people think they're always right if the person correcting them is young
Yeah. Anything like World Health Organization, World ....
If someone with authority over you is simply wrong….. and this happens in school, in business, in life……. There’s honestly not much you can do 🤷🏼♂️ the strategy of, calmly and logically explain to them why they’re wrong, almost never works
Tell them to plug it into a calculator.
I always thought that X divided by zero would just be X. Thanks for clarifying that. I'm still confused why it's not X and why it's "undefined".
I like how the guy is like "I wonder how can I explain this so that even a 3rd grade teacher can understand? - long division"
Teach your kid long division before 4th grade please. It is not that hard.
Most schools don't teach traditional math like long division anymore. I used to be a "brick and mortar" school teacher. I teach online now, and most of the kids I teach math to have NEVER seen traditional long division.
@@amy4484 Then how the heck do they divide big numbers by hand without using long division?
@@jakemccoy one hand holds the calculator, and the other presses the buttons. ;-P
@@jakemccoy Probably by using a similar thought process of finding max-multiples and subtracting them from the original value the same way we do for long division. The way we write long division is just an organizational pattern for recording the computation we're doing in our head, but it's equally effective to just jot down the numbers on a pad as we find them to reach the right answer, it's just not as pretty to read it back.
How much you value readability of the process of solving VS the final answer being correct is what determines if learning long division as a tool is worthwhile.
My mother was a math teacher. She had a sign in her clasroom, thou shalt not divide by zero!
The question itself is invalid. There is nothing to divide with. 1 divided with a blank space is not a math problem.
1 ÷ _. That is essentially what you have.
@@deker0954exactly these mathprofrssord have no clue
@@deker0954 This argument is totally wrong as 0 is not treated as a 'blank space' in Maths and not even in division.
When it's the other way around i.e. 0 is the dividend and 1 is the divisor, then you do have an answer and it's 0.
I need this now
@@adityajha67071/0, 1 divided amongst 0 people.
0/1, 0 units divided amongst 1 person, that one person would have 0 units, because if it's a single person, they will have the entire set.
I hated math in school... 15 years later I'm watching math videos for entertainment.... life is wild
A couple years ago, my daughter's 6th grade teacher tried to tell her a problem I helped her with was wrong and wouldn't accept my correction. So I went online and found the teacher's edition with all the answer keys, and it was wrong too. I emailed McGraw-Hill and they acknowledged the mistake, apologized, and fixed it. The teacher still refused to admit she was wrong.
Due to the gravity of idiocy
I had this same issue with a teacher back in h.s, bit of back story, i had ADHD (still do) and the PEMDAS thing never made sense to me nor could i figure out any problems using that, so one day teach drops our usual 10 q's pop quiz and i decide to try my own method of working out the problems, aced all 10 questions but i was given a 0/10, even after walkimg the whole class through my steps, all of whom came to the same answer they had, just without using PEMDAS, but because my method wasnt "in the book" i was still wrong, didnt matter that my answers were 100% correct, i was failed because i didnt use the "approved" method, well i ended up suspended for 2wks, and she lost tenure because of that, i guess you cant call your teacher a stupid bitch who needed to go back to college without getting in trouble, and i guess you cant tell your boss you wanna kill a student and still keep your job😂😂😂😂
@@omishimuzuThis never actually happened, did it?
Well, you put her on the spot and she refuses to correct her mistake despite irrefutable evidence-it became a tug of war between you and her and I NEVER would put any teacher in a spot.
@@jerryc3050 I didn't publicly call her out. It was a private discussion. I only even mentioned it because I want my kid to learn.
One of the most important lesson I learned at school is that, sometimes, adults can be completely clueless and ignorant. In 6th grade (11yo), I've been laughed at by my (catholic) religion teacher for telling her that the stars are immense balls of hot ionized gas, many of them much larger than the Sun. To her, stars were tiny specks of light, and that's it.
That teacher is an L
No way that guy is a teacher ☠☠
You should tell that to your science teacher
Which country are you from, may I ask
My 6th grade teacher said the Earth does a full rotation every day. Half by morning half by night. The classmate called her out LOL
Edit: I meant Revolution. Enough with the inane replies.
@@shahanshahpolonium France
What the parent should do in this situation: Look it up in a proper math-book written for adults, and show it to the teacher and principal. And if they are insane enough to refuse the content of a proper math-book, then you need to consider changing your kids school, because that tells a lot about that school.
Or just skip to the end.
Change schools.
@@khatdubell yes
@@khatdubell I think it would be fair to give them a chance to realize, that they had misunderstood some basic math, and then rectify it... And I would be surprised if they would still double down, if shown in a proper math-book.
@@DanildFlamme But they _had_ that chance.
And they _did_ double down.
Even simpler. Ask them to pull out their cell phone and show you that 1 divided by 0 equals 0. When their “all knowing” device’s calculator throws an Error they should be sufficiently bamboozled into capitulating that the problem is not as straight as they thought.
You explained the unexplainable! Holly smokes, I understand it! You need a trophy for this video. Amazing. So well done! I got goosebumps.
Thank you!!
The teacher and principal could at least punch that into any dollar store calculator and see that the result is error, and not 0. Ignorance plus arrogance is a deadly combination.
My phones calculator literally said you can't divide by 0. 😂😂
@@tianamarie989 You got the pathetic reality. Even a machine is smarter than some of the teachers.
Mine says Error. I mean the Iphone calculator.
So infiniti is just undefined
@@UCRjGzq33NDIz-YPwfuDBM8A that state meant is just stupid.
Computers are "smarter" as you put it than the entire history of humanity. Only limited to stuff with a system already built.
In 4th grade (1969-1970) I got a "C" on a science presentation because I pointed out that the sun is a star and stars are distant suns. My teacher pointed out that this was ridiculous because anyone can see the difference between the sun and a star.
When my son was in 4th grade his teacher tried to explain paramagnetism and totally screwed up the explanation. I explained how it worked to him for his homework and the teacher marked it as wrong. I set up and appointment and went in with the text from my graduate level electrical engineering class on electromagnetic fields and showed her the truth. (The fact that it was covered in a Master's of Electrical Engineering text should have tipped her off that she was not only clueless, but that she shouldn't have been covering the subject in a 4th grade class.). She was a clueless and stubborn as my 4th grade teacher.
Edit: People keep commenting on semantics of the english language and how the teacher was right in the usage of the term "sun" vs. the term "star". They're missing the point that she was convinced that they were completely different types of physical entities and that a star wasn't the sun of it's solar system and that our sun wasn't a star to another solar system. In her words, the sun was as physically different from a star in its structure as it was from a planet. Stars would still appear to be a star (same size and brightness) even if they were the same distance from the earth as the sun.
Why are you putting your kids through that? Why are you paying taxes supporting this?
@@rustyshackelford3371 Because then they would go to prison for evading taxes? 😭😭
first time through i misread this as as "tried to explain pragmatism" and wondered why you brought text from an electrical engineering class to explain pragmatism, then i looked again and it made sense.
paramegnetism in 4th grade ? That is more than ambitious
@@tuseroni6085 lol same
My daughter has a math teacher who has a bunch of kinder eggs with him at all times. Every time a pupil spots him making a mistake in a math calculation, that pupil gets a kinder egg.
What a great way to engage kids and keep them interested!
It teaches critical thinking. They are trained to distrust his calculations and critically apply the rigorous concepts they have learned.
And this is the kind of teacher we all remember for the rest of our lives. The one that engages us, the one that gets us to think critically about what is presented. Everyone should have a teacher like this but unfortunately most never experience it.
He'll be taken out by the government soon for teaching independent thought to children
Can't be having that now, how could our governments indoctrinate them on social media if we teach them to think for themselves? It's just not fair
I used to do similar in my junior high science classroom, changing up the prizes from time to time. Sometimes little plastic dinosaurs, bonus points, free time, etc. They were always hoping I'd make a mistake (and I usually did each period once a week or so...wink, wink).
1 cannot be divided by zero.... because nothing can be divided by zero.....
The fact the teacher felt the need to CC the principal on something pertaining to a third grader's homework says a lot about the teacher...
Might have been some sort of protocol for the school district to involve a principal at a certain point?
And the fact the principle came up with the same answer says a lot about the school as well. If anything I'd suggest this person bail from that school.
Yes. There is no doubt a BLM flag and a Trans flag in that Classroom. @@LibeliumDragonfly
@@iinRezalright grandpa let's get you back to bed.
Its a reddit post, its fake.
Covering embarrassment with arrogance is the ultimate form of stupidity.
Kruger-Dunning Phenomenon.
It's not embarrassment, it's ignorance. I'm inclined to think that both the principal and the teacher genuinely don't know. It's the dumbing down of a generation.
It is a skill every one of us has to learn when we are put into a position of authority. Whether a cop, a boss, a teacher, or a parent, we will eventually do something where we mess up and have to eat crow.
Sadly this is the trajectory society is heading and it's frightening to me.
@@klassike It's a club. The principal and the teacher are in an alliance against the parent. Our tribe must defeat their tribe, the winner is always correct.
I’m embarrassed for the principal. The teacher CC’d the principal for leadership and what came in return was support of an error rather than a proper correction.
Most teachers at my high school are barely older than the students. Its really weird
What does the principal know? He/she isn’t teaching math……shouldn’t the principal have gone to another for the answer?
@@valeriereneeharper I assume that the principal has graduated high school and hopefully at least a four year college... Everybody who has graduated high school should know the answer. This must be unique to the US and some third world countries where totally ignorant people can get education jobs.
@@johnj8069 Anyone who graduated grade school ought to know the answer. This is basic math, not advanced.
@@dtreezybecause a lot of sorry students becoming teachers.
I am 62 and was taught the answer is UNDEFINED because you CAN’T divide any number by nothing🤷🏻♀️
This is called common sense which a lot of people are lacking. LOL.
I was originally taught that something div 0 was infinity, and shown as 'evidence' how the answer gets larger as the divisor gets smaller, trending to infinity. Then I asked about negative numbers, which grow toward negative infinity. At zero, the answer is undefined, because that is where the discontinuity is.
I am 82 and why does your age matter?
@@chaoticignorant483 Age matters because back when I (and you) were in school we learned correct math/math solving skills. Obviously today’s kids are being taught a lot of junk.
@@Linda-s7o Sorry ma'am, but there were still issues with teachers being incorrect about things back in our days. We just didn't have the internet to tell the entire world about it.
I remember my Advanced Maths teacher (basically early calculus) showing us this answer, which was not in the curriculum whatsoever, with the intermittent joking of never dividing by zero or you might get sucked into an alternate dimension ("people divided by zero before and we've not heard or seen them since!"). He was a great teacher and knew how to make his class entertaining.
Yes!. Zero cannot be used as a divisor.
You can divide by 0, you just need more information is all. Because dividing by 0 gives you two answers. Infinity and negative infinity. That's why it's undefined, not impossible.
"Divide 1 by 0 assuming you approach 0 from the positive side."
This actually can be divided, giving you the answer of infinity
@@poa2.0surface77 Buying something is not division. It's subtraction. But I'll explain why dividing by zero gives you both infinity and negative infinity.
1/1=1
1/0.1=10
1/0.01=100
1/0.001=1,000.
As you get closer to 0, the result gets higher and higher. When you reach 0, you've reached infinity. Why this results in negative infinity is because it works the other way as well.
1/-1=-1
1/-0.1=-10
1/-0.01=-100
1/-0.001=-1,000.
So as you reach 0, you also get negative infinity. This is why dividing by 0 is undefined. Not impossible.
@@poa2.0surface77 In order for 1/0 = 1 to be true it would also have to be true that 1x 0 =1 and it does not. It equals 0
@@poa2.0surface77 0 x1 means repetition of 0, 1 time which is 0, or it also means repetition of 1, 0 times which again is equal to 0. (hmmm, you know, the concept of nothing) Perhaps you've forgotten that multiplication is simply repeated additions.
I've been there when I was in high school. Reason and logic won't work. It will require AUTHORITY. You can try a Wikipedia reference or a college text book. But a letter from a college professor (with all his/her degrees mentioned along with papers publiched), copied to the principal and to your kid, is probably the most effective. Don't get worked up, but also don't give up. You can also turn it into a lesson for your kid: adults are not always right.
I would just pull my kid aside and say “mr. teacher is an idiot” and explain the concept myself.
Schools are small gulags of a socialist system.
I would just change schools, especially since in the last year we’ve seen a lot of people who agree with me that if people in charge are doing stupid things, you best off going to places where they’re not in charge
@@S8EdgyVA This is too small an issue to change schools over. But if there are a lot of these, then perhaps. In a large city, changing schools might be possible, but in a small city, no. I grew up in a city of around 10,000, which was the biggest city in 100 miles. The next high school was 25 miles away.
“Reason and logic won’t work”
The one person in the comments who gets it
I'm convinced the absolute best thing a teacher can teach is how to accept being wrong. Everyone makes mistakes and modeling how you handle making a mistake is a critical lesson that too many people haven't learned. Normalizing failure, mistakes, losing, or just plain old being wrong, is something our culture (particularly the US) NEEDS.
Refusing to admit fault is also a fantastic way to get your students to hate you. I'm still pissed at a history teacher who gave me a zero on an all or nothing quiz because of one question that I didn't get wrong. He was wrong, but refused to admit it and my grade suffered. It's been years but I'm still mad about it.
kudos to the host of leaving the silly school politics out. imo the organic answer that cannot be calculated or arrived at by formula is - one. for example if there is one pie and there are zero people sharing the pie..... you have one pie. this is a rare example in mathematics where you truly have to think outside the box.
Is it possible to graph a decimal in Cartesian plane?
@@Aaron_1112-- yes it's possible.... i've done this on an boeing plane.
If you have one apple and you divided by no apples, how many apples do you have one apple?
4:03 I think the reason is because the calculator would tell them the answer is 0. We are more and more dependent on the devices...
I'm willing to believe this as the cause.
Most calculators I used only shows “error” when u try to divide by 0
My dad was a maths teacher and he explained it to me this way:
If you have zero Skittles and want to divide it equally under 4 friends, how many skittles does everyone get? That's right, zero.
But what if 4 skittles are lying on the table and nobody is there, how many skittles does everybody get? That's right, makes no sense. And that's why you can't divide by zero.
Great analogy :)
Shush you with the common sense answers.
if a tree falls in the forest and noone is around to hear it, does it make a sound
@@johnpaullogan1365unknown and impossible to know!
So the third grade teacher is standing around trying to give skittles to ghosts?
I am a third grade teacher. I happen to know that 1/0 is undefined (I tell my students that it doesn't exist if they ask), but I never understood why. Your explanation made it clear to me. Thank you!
😃
see i really do have a problem with the undefined answer though, if i have 1 banana and divide it by 0, i still have one banana
or say i have 4 of them and divide them by 0, i'll still have 4, dividing something by nothing doesn't make the 'something' change in any way, so it is still a defined number.
@@robgilmour3147a banana is a banana it is not an integer but an object so your banana will not magically disappear. Your rationale is being hampered by your level of abstract thinking.
@@robgilmour3147 If you have 4 bananas at the end then you actually divided by 1. You divided the bananas so that you have 1 portion of banana. Dividing by 0 is literally impossible since you can't divide into 0 portions.
But the real answer here is don't think of numbers like objects because that makes things difficult when learning complex numbers.
My god. The fact that you can't figure out why it would be undefined is shocking to me considering you are a teacher. You do not need this elaborate explanation you need a functional brain. How can you divide anything by nothing? the answer would either not exist or be infinite. You do not need this video to understand this.
"It's easier to win an argument with a genius than with a fool."
- Idk who it was but it's true
Mark Twain?
@@ErokCherokee No, nobody said that. You're probably thinking of "Never argue with an idiot. They will drag you down to their level and beat you with experience." Which people CLAIM is a Mark Twain quote, but Mark Twain never said anything like that in his life. It's ultimately a common sentiment that slowly adapted over time, and it may have roots in Proverbs 26:4
Or " Who is the bigger fool? The fool? Or the one who argues with the fool?"
"It's easier to win an argument with a genius than a fool." -azranger7294
This is why cancel culture is horrific you can’t reason with the people who want to “cancel” others.
I taught Engineering Mathematics fundamentals, at the collegiate level, and ended up creating a remedial, math course for nearly 2/3rds of these students to help them 'unlearn' fallacies taught in the public, school system. Students are not being properly prepared for the rigors of higher education; They are being prepared to pass tests...
Eliminate school taxes and make parents solely responsible for paying for their children's "education" and the schools would be forced to change their approach.
And things not falling down is quite basic!
@@garthornspike3648Yeah, that won't work
@@garthornspike3648”Only the wealthy should get an education” is a wildly stupid idea.
@@garthornspike3648 that's not going to work. The rich would hog all the better teachers while the majority of us middle/low and peasants would get mediocre lower status, fish (newbie) teachers.
The best way is to invest in higher education or outside education from the public school. It's an add on. That way, the student can be ahead of current level. Many Asian parents put more classes like math, reading and etc in the East.
This is as easy as reversing the operation. "So 0*0 is equal to 1 then?" That will shut the teacher up
This is is the easiest and most obvious way to prove it too. Which it makes it even more mind boggling that they are just willing to die on that hill. Not to mention the dozens of other ways to prove it. Then there’s some fools in this very comment section that 1/0=1. Incredible.
@@RanOutOfSpac It can!.... sort of... sometimes in calculus. And it technically isn't 1/0, but rather the limit of f(x) as x goes to 0 of say f(x)= sin(x)/xcos(x) Though f(x) in that evaluates as 0/0, and approaches 1. But I can't think of a function off the top of my head that works.
And 1/0 still technically isn't 1. The limit of the function is equal to one, which is only sometimes the same.
If I have a pizza. 1 pizza. Now I divide it zero times. What's left? It isn't zero pizzas. It's my 1 pizza. I didn't divide it because 0 means nothing. I divided it 0 times. Can someone help me out here because this shit makes no sense at all to me. It's like if I divide that same pizza once, I now have 2 halves. So I'm at 2 1/2 pizzas. Put them back together and I'm at 1 pizza.
@@Richard-gw2lr If you divide 1 pizza by 4, you get 4 slices of pizza. If you divide 1 pizza by 1, you still have your 1 whole pizza. When you start dividing your pizza by a number less than 1, you begin to bring more pizza into this world from a different dimension. 1 whole pizza divided by 0.5 is 2 whole pizzas. Notice how when you divide your whole pizza by a number greater than 1, you only end up with the same whole pizza but in smaller slices. However dividing your whole pizza by a fraction yields more pizza than you began with. As you divide your pizza by a number that is closer to zero, say 0.00001, you get something like this (1 whole pizza / 0.00001 = 100,000 whole pizzas).
Therefore your initial statement "If I have a pizza. 1 pizza. Now I divide it zero times. What's left? It isn't zero pizzas. It's my 1 pizza." can not be true because as you divide your 1 pizza by a number that approaches zero, instead of ending up with your 1 pizza, you end up with a number close to infinity of pizzas. The sheer number of pizzas entering our world will cause our universe to implode into a hypermassive pizza black hole. This is why you can not divide your pizza by 0.
@@Richard-gw2lr You’re treating division as if it’s subtraction. It’s not. It’s a process that explains fractions.
I’m no expert, but the easiest way to check your work is to use its opposite operation, multiplication. For 1/0 to = 0 the reverse must be true in multiplication, but 0*0 does not = 1 so it’s not. The fellow above me explains it better too. Division IS weird like that, but it has to be because division isn’t subtraction, it’s the inverse of multiplication and it needs to match. There’s more and far better reasons out there, but that’s best my smooth brain can explain off the top off my head. I’ve seen some great explanations using graphs too.
I remember learning this fact (that you can't divide by zero) in elementary school. The fact that both the teacher AND the principal got this wrong is really disturbing.
They don't even teach math properly anymore from my perspective. Oddly enough I was one of just a few kids that liked proving math because my dad was so into computers, even in the 70s. it was nuts but to this day that old school math is used in my tech job with scripting so I still have interest but I had to show my own child how to do it against the public school process. Education has fallen off the deep end, today 2x2=oppression.
I was taught this it is 0. I'm 40. Nothing has changed.
Well, I honestly forgot so I appreciate the reminder.
@@Kitsuragi556True, it’s very possible that this teacher and principal don’t even exist
@@Kitsuragi556
As much as I hope you’re correct about this it wouldn’t surprise me that was a true, unembellished story.
I went through ALL of elementary, junior high, high school, and college (with a bachelor’s in the STEM area) with a miss understanding of the order of operations because my 2nd grade teacher taught it improperly. Failed to mention that multiplication and division were equal to each other. The same with addition and subtraction.
Always thought it was parentheses, exponents, multiplication, division, addition, and then subtraction; Only in that order not the correct way of parentheses, exponents, multiplication/division (left to right), and then addition/subtraction (left to right).
I don’t know how no teacher ever noticed/cared Kindergarten to Collegiate to correct me. It took a fricken UA-cam video that I stumbled across accidentally and subsequent investigation for me learn a basic math rule.
For those not getting it. Type it into your phone calculator and you will find you cannot divide by zero.
It's clearly something this teacher was not taught.
The math teacher didn't go to the principal to back up her math (unless the principal has a math degree), the math teacher went to the principal to exert her authority. It wasn't about being correct, it was about shutting the parent up.
And that.
A lot of things i don’t like about the Bay Area, but try that crap here and 3 parents with PHds in math will shut that principal and teacher down.
The audacity to presume one has the “authority” to override reality itself. It’s stuff like that that leads to all sorts of awful things in our world. In this situation, it didn’t matter much as it will probably be corrected in middle or high school. But imagine if it was something of serious ethical importance, and they still refused correction? Attitudes like that which do not care about reality can destroy lives. Here it couldn’t, but the same absurd refusal to acknowledge reality could be a serious danger in another situation.
Humanity and civics needs to be developed in education. Without civics and ethics being taught, formed, practiced, and required all sorts of issues are bound to happen which are 100% preventable.
Wow you must be telepathic, to somehow know all that from the limited info in the video. Or are you personally involved deeply in the situation mentioned in the video?
I'm willing to be you're straight up assuming many things and deciding a conclusion based on those unfounded assumptions. which makes you as bad as the teacher in the video. :) come down to earth, don't assume you know what's going on.
@@scruffygaming627it's reality the teacher and principle are both wrong. The error was pointed out and yet they double down on asserting something wrong. Why do you excuse it and want to let it slide ? Tolerating nonsense is tearing society apart.
I’ve always wondered why my 8th grade students struggled with pre-algebra. Now I know it’s the 3rd grade teachers fault. 😂
Generally, algebra uses a lot of logic to solve equations. It doesn't require someone to be good at arithmetic.
@@chucksucks8640I would argue otherwise, algebra is mostly variable manipulation, solving systems, and basic arithmetic
My third grade teacher insisted that it wasn't possible to subtract a larger number from a smaller one, and she made a big thing about it, too. She could have just said that there was something called negative numbers that we'd be learning about in a couple years, but that we wouldn't be learning about them in that class. But no, she had to insist to everyone that it wasn't possible.
Except her class isn’t even close in the end goal. She’s a mere fraction of the entire infrastructure. Better to show students a glimpse of the entire picture than telling them some bs lie which will cause more confusion down the line
@@chucksucks8640My third grade teacher told me abou5 negative numbers when I asked about switching the numbers that got subtracted, which allowed me to mess with them and understand them in third grade
When I was 10 years old, I got into an argument with my 5th grade teacher that rainbows are not just random colors in random order. I kept trying to explain the speed of light and the order of the colors are always the same in rainbows. But she doubled down and told everyone in the class that I was wrong and every rainbow is like a snowflake and the colors are always different in different order. Has she never watched an episode of Barney?
Dude ive had nurses tell me certain drugs are not used for their SCIENTIFICALLY proven purpose but " just get you high so you forget about ______". No understanding of receptor activity or how this substance blocks signals in parts of the brain. Nope it just gets you high. I was stunned a RN a TRAINED nurse knows less about stuff she is perscribing than i do. And we wonder why opioids where an issue? Maybe its cause Humans REFUSE to educate themselves fully before thinking they know something
Some of the dumbest people i've met were teachers
Someone needed to bring that poor lady a prism
Maybe she was talking about the people who use it as the flag.
Generally you are right about the orders of colors in a first-order rainbow. Please take the second order of refraction into consideration where the order of colors is inverted and the intensity is greatly reduced.
To the genius in the megathread who stated that dividing by zero was equivalent to performing no division at all, while agreeing that "No amount of nothings make a whole"--- anyone not not properly acquainted with the difference between an identity element and an inverse element should not be teaching math.
Reddit post aside, you just taught division in less than two minutes better than ALL of my time in school.
I mean you’re a grown up now, with greater cognitive depth to be able to easily comprehend what is said. Your teachers probably taught you the same way
@@bales1569I've never understood long division through all of my schooling, and never had it taught to me in an understandable (to me) way. Watching this, it just clicked. And I don't believe I am much smarter than when I left high school 3 years ago
@@braydos1578 you actually are you don't realize but most people use basic math almost every day.
Don't just put yourself down you should recognize that you are more intelligent.
he taught the old school way.... today is the new math..... the old math is racist. lol sorry had to say it.
Im not out of school and same
"Cannot divide by zero" should be immediately recognized as true by any elementary school teacher. This is a good explanation of why.
exactly. Because zero can not even converge to a value, positive or negative. It is simply nonsensical to divide by zero.
@@escapegulag4317 Actually, the whole explanation in calculus as far as "undefined" is that it DOES approach both positive infinity and negative infinity and that's why it's not defined. Take 1/0.1=10; 1/0.01=100, etc... 1/-0.1=-10; 1/-0.01=-100, etc... so as both of them approach zero, they'll end up in two different places, i.e., positive or negative infinity. Easy fix to it actually... just rip out the piece of paper and fold it back onto itself, so that both infinities meet at the same point. You've now created (absolute) infinity and negative infinity = positive infinite. Now it's a number rather than a concept and after googling "Riemann Sphere" you can move on to "Wheel Theory" to understand how you can deal with 0/0.
Actually you can divide by zero, it's just that a calculator says that on purpose so it doesn't become a black hole.
dividing by zero requires a undefined condition outside the pure problem. look at it this way.
in a word problem. there is one apple on the table. divide the apple for two people, and you get one half. divide it for one person you get 1 apple. and divide by zero people you get 0 apples when you define how many apples do people get. when you define how many apples are there, you still get one.
so, take 0 apples and divide it between two people? you get zero apples left and zero apples for the kids to eat. they are the same, they do not need to be defined. this make sense?
for any number to make sense, the problem must be fully defined, and dividing any nuber by zero without context expressed in the problem cannot be solved, because there is no slot for the numbers to fall into.
It was like the FIRST thing we were taught lmao. How does anyone get hired by a school and they can't do 2nd grade math...
What a great life lesson. He learns that most authority figures are not necessarily intelligent and just because they are in authority positions doesn’t mean they are right.
jep politicians are prime example
Last lesson to learn is "just because they're wrong doesn't mean the situation allows you to ignore their authority", the harshest one
Yeah primes them for working for CEOs for the rest of their lives.
Most authorities are just people born in the right family.
Imagine only learning when you're an adult that adults are still idiots...
Most amazing part is how he switches between red and blue markers so fast without a mistake.
I didn't realize it until you said it. But it also helped with following what was being explained.
This guy is a really good teacher.
He truly a wizard with the markers.
I managed to teach myself how to switch between two pens while holding them both in the same hand like that at some point in middle or highschool.
The next year tho, I'd completely forgotten how I did it, and I still cant do it anymore.
I mean I knew he used different colors, I didn't even realize he did it seamlessly. That was smooth as soft butter
@@PanoptesDreamsExactly. It did help a lot and the transition so quick there was no distraction yet the color change did make it more clear. Was like a magic show. At first I thought the colors were changed in post with digital editing. Nope.
The answer is 0 up until you take the test, and once you pass, it’s undefined.
As someone who struggled with math in my younger years, learning the foundations is extremely important. Mathematic principles compound on each other so if you don't understand the simple concepts, you will never understand the more complex ones.
The teacher and the principal were both very wrong, and it is very important that they be corrected for the sake of all the kids that they are teaching.
I think it's clear they were a regular principal, not a mathematic principal...
Yeah, there are many thousands of people that think you can spend your way out of debt.
Ignorance of math is no excuse! Any one who says different is a ignorant peasant and will be treated as one.
@@solarsynapse all of them Americans.
They wouldn’t be teaching little kids if they ware capable.
We respect teachers but that doesn’t make them geniuses, far from that.
Anyone who’s average or even slightly below can teach children.
Capable children will achieve success regardless.
World is full of excuses.
When I was in the third grade I used the verb "trudge" in a sentence I wrote for a grammar exercise, meaning "walk slowly and with heavy steps, typically because of exhaustion or harsh conditions". My teacher took off a point and accused me of making up the word. The word was not in her pocket dictionary.
Not a scrabbler that's for sure
I remember in 5th grade i learned the proverb "all work and no play makes jack a dull boy" from reading little house on the prairie. I used it in an essay and was proud of myself for being able to include something I learned all by myself. My teacher docked me points and said using that phrase was too advanced for my grade.
Same teacher also sat me next to the troublemaker kid to "control" him and scolded ME when the boy cheated by copying answers from my tests.
I think I was in first grade when I was talking about a book I’d read and verbally used the phrase “horse’s foreleg” because I’d learned it from the book. My teacher just looked at me for a second and slowly said, “Yes… horses have… four legs…”
That’s the first time I can recall thinking that an adult was dumb for not knowing something I knew.
Damn dude, that's harsh, wish I could have lent you my mother for the occasion, she woulda rattled that teacher outta her socks. Her life would never be the same.
@@PinkieSugar Jesus Christ, don't y'all have parents to go shake down the principal?
Give her 8 crayons and ask her to divide it into 4 groups. There will be two crayons in each group. Congratulate her. Now take them all back. Next give her one crayon and ask her to put it into zero groups. If she just sets down the crayon tell her that is one group and you wanted her to divide the crayon into zero groups. Did the crayon disappear into zero? No. You can’t divide one crayon into zero groups. It’s IMPOSSIBLE!
yes, so it' s one group of one. not " undefined". it just doesn't work the same as other numerals, ther e is no reason not to declare it an exception to the rule.
@@theCosmicQueen Uh, it is undefined. It's not a group of one. The answer to the crayon question isn't to just put the crayon on the floor or table.
The question is asking her to give that single crayon to 0 groups, as in, give it to anyone, or put it on something, or even keep it yourself.
It doesn't work. You can't give that crayon to nothing.
That's why it's undefined.
She might just end up eating the crayon 😂
@@skyhong16in that case she still put it in the group “edible” 😊
This is a very unnecessary conflict blown out of proportion. You'd end up being burning bridges.
Yes you can argue if you take 5 apples, multiply it zero times, "how many apples do you still have?"
But blowing this out of proportion makes things worse. And thats what Yankees do
Just what did the math teacher learn to think that something as obviously undefined as 1÷0 is equal 0?
I think a good way to describe division is as repeated subtraction, essentially how many times you have to subtract the divisor from the dividend to get zero. If 1/0 was in fact zero, that would imply that zero subtracted from one zero times would be zero, which implies that one is equal to zero, which makes sense when you consider how many teachers this kid has in theory, versus how many he has in reality
I prefer the opposite strategy (which essentially means how many times do you have to add up the number you're dividing for so it will be equalled to the number being divided)
This is what I taught my kids. How many times will you take zero from one until there's nothing left? This should give them the idea that they can subtract forever and 1 still remains. The answer therefore is not zero.
I actually love this, thanks
very funny but let's not slander her as its probably just a small mistake
@@CrossJComicnorth tecnically the same, both have the idea that the 2 numbers need to have a difference of 0
my third grade teacher was trying to tell us that texas was bigger than alaska just because the map she showed us had alaska in the corner, not to scale. it was a real confidence booster proving her wrong
Many people don't realise that maps have to adjust size to be able to coherently project what's on a globe to a rectangle. More people should be aware of that as a common knowledge...
Yeah maps are projections. They are never to scale. There are a few interesting and well designed maps that attempt to show everything to scale though. Not useful outside of that specific purpose though. Although I suppose a globe would be more accurate.
@@An.Unsought.Thought Why do people not just own globes.
the number of people that get this wrong and don't even know.. is too damn high!
Ah, Mr Mercator
The most impressive part of this video is the presenter's ability to swap colors without thinking. I can't even write with two markers in hand, much less swap then that easily.
because he can use chopsticks apparently
"Without thinking". Yeah, I think that might be your problem. Think harder.
@@AH-yd8pq😂
An absolute marker legend
Omfg I actually never saw that, or I saw the colors and my eyes appreciated it without noticing it at any point before seeing this comment :D
My 4th grade teacher told our class that Neil Diamond was the first man on the moon. I told her it was Neil Armstrong, and she made me stand in the corner facing the wall during recess for a full week for being disrespectful. Let's hope she's no longer terrorizing the nation's youth.
It's because Neil Diamond sings "Love on the [Moon] Rocks" ...
as i recall from elementary school, keith moon was the second man
As a teacher myself, if there is a question I don't know the answer to when asked by my students, I straight up tell them I don't know and we'll look up the answer together.
Much respect for your willingness to question and check.
I had a doc (MD - and you know their rep for having the god complex) one time who listened to my description, flipped open a book, and showed me a picture. "Is this what you're seeing," he asked me. "Yes." I was so impressed. Clear comms. Good info. Correct diagnosis and treatment. Same story, much respect.
But Nenah Cherry asked her teacher why the sky was blue and not white, and the teacher wouldn't answer her.
@@mikestone5595 maybe because the teacher doesn't know the answer to it. Don't assume teachers know the answer to everything. I personally like when my kids asks questions no matter how ridiculous those questions maybe.
Your job isn't to know everything. You just have to teach our kids how to find out anything. And it sounds like you're doing that!
"It's not what you don't know that gets you in trouble, it's what you do know that just ain't so"
--possibly Twain?
Once while my teacher in high school was preparing the class for the SAT, I mentioned to her that one of the geometry problems had two answers. It was a question where you had to identify which pattern of boxes could be folded into a cube. There was one obvious one and one wonky one that no one else in the class picked. The teacher didn't believe me when I told her the other selection also formed a cube, so the next day I brought a cut out of the pattern and folded it into a cube in front of her and the entire class. The teacher still wouldn't believe that the SAT would make a mistake like that. Some people are just mindless drones happy to be living in ignorance.
Not math related, but still ignorance related.
In 2011 I wrote a 7 page biography on Barack Obama for a paper. We were using TurnItIn to check for plagiarism, plagiarism checkers were fairly new. 5% of my paper was paraphrased from sources I used. 47% of my paper was similar to over 50 other student's papers because Obama was a very hot topic, after all there's only a few ways to write "Obama was the 44th president"
Anyways she refused to believe I didn't source 50 other papers and paraphrase 1 sentence from each so I got -52% for plagiarism 😒. I feel bad for students who might get false flagged for AI papers today
Yes, they are called democrats!
It's obviously too late now but I would just point out to the teacher all the times in which the SAT has been wrong in the past and been correctly called out by students, not teachers. Veritasium just posted a video about a notable example of it.
That's crazy because I always thought those "which one is a cube" questions were insanely easy
The fact you went to the effort to actually make that cube net and demonstrate it shows you're going to go far if you ever take up a STEM subject! You're willing to physically test a hypothesis!
It should be pretty easy to ask the teacher, "If 8/2=4 implies that 4*2=8, then 1/0=0 implies 0*0=1."
True
But that would be wrong because disagreeing with the teacher is insubordination. Even if the teacher is objectively wrong, it is morally wrong to embarrass the teacher and put their job in jeopardy. In the real world it works the same way. Especially if you have an advanced degree and you work for someone who doesn't. Helps saves you from getting fired, plus arguing about what diving by 0 gets you doesn't get you to the bottom line, namely making money, any faster - rather it delays it.
@@cryora Where do you live where being wrong as a teacher can put their job in jeopardy? I frequently disagreed and argued with teachers. I was often wrong, but sometimes teachers were too. No one ever got hurt, punished, or lost a job over it.
@@cryorainsubordination? Wow that is a whack take. The teacher is the one who brought her boss into the conversation so, if they get embarrassed or fired it is their own fault.
Different world. That's why all the decent teachers have quit.@@Dojan5
I tried dividing 1 by 0 and now the left side of my body is numb
In first grade, I got a B on an assignment for how I spelled ketchup. My teacher said the proper spelling was catsup. As she went on teaching, I quietly consulted a dictionary, wanting to know if I was truly wrong. I found that both spellings were in the dictionary, and respectfully pointed it out to her. She was flabbergasted, and sent me to the principal’s office. My mom had to come in and talk to the principal, who told her I was correct and would not be punished. That was an early lesson in critical thinking for me.
Actually, catsup is still likely wrong depending on the context. Ketchup is a very legally specific term referring to a very specific foodstuff made with a specific proportion of ingredients. If a manufacturer deviates from the legally defined ingredients, they can no longer legally define their product as "ketchup." "Catsup" is to "ketchup" what "creme" is to "cream." "Catsup" is a ketchup-like tomato concoction (and in some cases abomination) that does not meet the strict legal requirements to be labeled as "ketchup."
So, yes it is ketchup, and anyone who tries to tell you that their "catsup" is ketchup is at best misinformed, and at worst comitting food labeling law violations. Just to be safe your teacher should probably be investigated by the FDA, the FTC, the CFPB, and the USDA. It's the only way to be sure ;)
Yes, "correctness" in spelling was the first to go! Then there are the "englishes".
@sophiedowney1077 Yes coz that's the detail 6-7 years olds would be worried about 😂 Good lord!
@@sophiedowney1077I feel like you made up some of those letter names. I freely admit I could be, and most likely am, wrong about that, but it just feels made up.
@richardwilliams3080 Food And Drug administration, Federal Trade Commission, Consumer Finance Protection Board, and United States Department of Agriculture, respectively.
The crazy thing is, if the teacher just put it into a calculator, she would have seen it wasn’t 0. She would have gotten an error
i think the teacher would think that calculator has error instead...
She, like many educators today, is disenchanted with math, clearly.
The best solution is to fill in the necessary gaps with your child.
I know we WANT all teachers to teach well, but this isn’t the land of imagination, so the effort will need to come from the parents, overall.
I am so lucky I don’t have kids! 😂
this is so ridiculous that i am going to say that reddit post is a lie
Actually, the answer is "undefined" per Google. Also, doing the math on my mini calculator (1 ÷ 0), the answer is 0 (zero). 1 ÷ 1 = 1. So, we'd not get the same result for 1 ÷ 0.
At any rate, the better answer here - probably - is "undefined."
I just verified it. It doesn't even say error, it directly said can't divide by zero😂
I didnt understand this concept until I heard somebody say that 0 is a placeholder for "nothing". Then I reread the question as "one divided by nothing." How many times can nothing fit into 1? No answer.
To infinity, and beyond!
But it isn't.
And then it wouldn't make sense for "nothing" to be part of any operation.
Thanks for explaining it in a "dummy" way. I finally understand. My son is a maths teacher and he didn't get thru to me. 🌟
@@MrCmon113 You are right.
That’s a great explanation! I didn’t even know that. That makes a ton of sense!
So 0 isn’t an amount; instead it represents a complete absence of anything that even could be quantifiable. Have I paraphrased that accurately?
In highschool, I had a math teacher who taught AP and was generally a very good teacher, but didn't know pi could be calculated using a circle. At that point I understood secondary school teachers aren't the real deal when it comes to knowledge in a particular field.
In high school one of our teachers that had a major in Geography tried to tell my Indian friend that he was European. She absolutely would not concede that India was actually in Asia. We still laugh at her
She was trying to say that they're "caucasian" rather than "asian." This is based on the old idea tthat there are basically 4 categories of people. White, black, asian and other.😮💨
He's euroasian. Europe & Asia are just both to immature & lazy to recognize they're part of the same continent.
@@TheToxicP I mean, Africa Europe and Asia are all on big land mass. Afrosia
I mean, Africa, Europe, Asia, and the Americas are all on the same earth so, technically, it’s Afromersia.
She wasn't really wrong though?
😂 I had a similar argument. My daughter was confused by her math because they kept swapping the order of operations. So I told her she could reorder things and it’s usually fine.
Ex. a+b=c is the same as c=b+a
And her teacher flipped, laughed in my face and told me you can’t do that and it ruins the math. 😂 wtf?!
litterally the commutative property of addition and subtraction
It works when you add or multiply
@@sanjayrajagopal7416Addition and multiplication have the commutative property, but not subtraction and division. 2+3=3+2 and 2x3=3x2, but 2-3≠3-2 and 2÷3≠3÷2.
@@pawechronowski5684 neither subtraction or divisione have the commutative proprety
b+a is wrong though
My younger brother once had a teacher who asked the class to name units of distance, and my brother offered "lightyear" and was told that it was a unit of time, not distance. He mentioned it to me after getting home that day, and I told him that he was right, but there definitely is a common problem where teachers will simply state whatever sounds correct to them as if it were absolutely true, even if it's on a subject they know less than nothing about.
I remember that answer from 5th grade. I guess the teacher can't get past the "year" part of the dimension.
@@joefaller4525 Just like many people can't get past the hour part of kiloWattHour. When you add in that 1 Watt is 1 Joule/second they are completely lost.
I learned that one in pokemon. The guy in brocks gym makes a comment on lightyears and when you beat him he corrects himself or something like that
Is not the definition of a lightyear "the distance light travels in a year"? I think the teacher needs to go back to school.
Lightyear is time . Because you can’t pass over 1 year
My wife is a teacher, currently taking classes to become a principle, so I asked her about this to get her perspective as both a teacher and a prospective principle. Here is her response.
Unfortunately, we have to teach kids based off the TEKS that are decided by politicians. The standardized tests are based off these TEKS so it is in the childs, and the schools, best interest to learn that anything divided by 0 equals 0 because that is what is going to be on the tests. The teacher could have handled their response to the parent better, but unfortunately we are not allowed to directly tell a parent that we have to teach the students based off the TEKS. As a principle I would have told the parent that the concept of "undefined" is something that is taught at a higher level and that the teacher has to simplify certain concepts so that they can be grasped by ALL the student on that level.
When my eldest daughter was 8, a supply teacher asked the children what the sun was? She put her hand up and said “it’s a star miss” the teacher not only told her she was wrong, but had the whole class laughing at her for getting it wrong. It took me ages that evening to convince her that she was correct all along. This is where education can be dangerous.
What did the teacher say the Sun was? A big flashlight?
@@chapagawa I can’t remember exactly. I think she said it was simply ‘the sun’ and the only one
What is a "supply teacher?"
@@Narsuitus it’s usually a semi qualified/trainee teacher who works part time helping the regular teacher
@@alanhaynes9672 Well, I guess if you limit the scope of the investigation to our solar system, she could be right…. Sorry for your child’s embarrassment for being right, but a good lesson from Twain “Whenever you find yourself on the side of the majority, it is time to pause and reflect.”
Dividing by zero is like whacking someone with a non-existent stick and expecting to hurt them.
you had a stick you just didnt do anyhing to it , so you still have a stick. 1% 0 is 1 0% 1 is 0 you had nothing and still have nothing . caint divide nothing into parts of something..
Well, you actually can divide by zero (in a way)... you just have to be specific on how you'd want to do it - else you'll get "undefined" as an answer.
If you form the derivation of a function you pretty much divide by zero (while forming the limit), but in a very specific way.
"If I have 0 sticks, how many times should I whack you for you to feel five levels of pain?"
You have zero dollars now divide that one time.
@@lythonoise Zero can be divided by anything (except zero) and always give out zero:
I have zero cakes and I keep those for my self (divide by one) = I still have zero cakes.
I have zero cakes and share them equally with 6 other people (divide by seven) = we all have zero cakes.
Problem starts when you have something and try to divide by zero.
If I have one cake and keep it to myself then I divide by one, if I share it with those other people then I divide by seven...
...but how do i equally distribute one cake to zero people?
I always knew you couldn't divide by 0 but I took it at face value. I never actually understood why until you broke it down. Thank you!
It's never a good idea to take stuff at face value, so it's good you're expanding your purview.
P.S. don't take this at face value. Ponder it yourself and reach the same conclusion.
@@xinpingdonohoe3978 They probably just didn't think about it enough to care. Not that dividing by zero comes up often.
Well, technically you’re also taking his explanation at face value. But yes, walking it back (0×0≠1) is convincing.
It will be like splitting 8 slices piza amongst 0 people, how many slices does each portion have?
@@Nathan-jh1ho that's not really a good comparison. Each person could have 0, 13, 10^10^10^7, or anything, and nothing would change. However, in truth you would observe it going to ∞, and your comparison fails to demonstrate the divergence.
1×0 is 0. Is that what she's confusing? 1 ÷ by nothing would leave it the same. Her logic doesn't even make sense.
When my family and I emigrated to the United States from Germany in the 1970s, my American teachers didn't believe that a 7-year-old German kid could do the additions, subtractions, multiplications, and divisions in the head without writing out the exercise and the process. That was how I was taught in Germany prior to our emigration. Same with the cursive handwriting (I was only kid in the entire elementary school who could write in cursive handwriting with fountain pen as it was norm in Germany). Gradually, i started to hate doing math exercise and developed the aversion toward the math classes. That is very tragic and unjust how the teacher's attitude can cause the lifelong damage to the students.
Same here
Ditto.... I hate math because I always had to prove it to the teacher in writing. I just stopped....
This is probably the standard throughout all European countries that kids are taught to do basic calculations in their head during their first years of a primary school.
@@yes12337 Europe as well as asia
My daughter went to a private school for kindergarden and half of 1st grade, we had to move so she had to go to public school.. she could read and write in cursive and do math in her head the class she was in was learning CAT SAT. I guess that was a sentance for the class to learn that week. The teacher told my daughter she had to learn like the rest of the class and couldnt read books from the 3and 4th grade section of the library only the 1st grade section same with doing smaller math and she wasnt allowed to write in cursive. After a few meetings with the teacher that didnt go so well.. that is what led us to homeschooling!
I taught pharmacology at a nursing school. One day I decided to take a master's course in pharmacology, just for the sake of it and to see what new material I could pick up, at a university. My very first test I scored a 59. I was shocked. No way, I scored a 59. I know my pharmacology. I went over the test and wrote to the professor explaining why my wrong answers were actually right and cited medical textbooks. Needless to say, my score of 59 was changed to 98%. The scary part is that there are teachers out there teaching that do not know their material and they are wronging right answers. At a college level, that is very detrimental to the students considering that it impacts their whole future. Maybe that is why we do not have smart people running the country, because all the right ones were wronged.
I work in a hospital and I can say with full confidence that the doctors are the dumbest people there.
Good working theory. I remember being very frustrated with this as a kid too, a lot of language teachers don’t know what they’re doing either, just like math and science teachers unfortunately.
This explains why I flunked out.
Thank you!!!!
To be successful in America, all you need is to be confident, convincing, and loud. Helps to be good looking too.
Intelligence barely plays any factor.
Less so at the college level, but often teachers are not given a choice of what they teach but rather have to teach what nobody else wants or administration doesn't have a specialist for.
At least where I live, nurses make far more money than teachers do and even more than all but senior professors. So where is the incentive?
Society does not value teachers much these days. I wouldn't become a teacher even though I realize how important it is.
I remember my daughter’s biology teacher once told her that corals are plants. We talked and she doubled down and also got the principal involved. In my experience a lot of teachers just make stuff up instead of saying “I don’t know” or looking it up and then their pride gets in the way. This is why I really respect teachers who love what they do and are really interested in their students’ learning process instead of just going through the motions.
I knew of a teacher that taught that the earth was flat, after watching the Apollo landing on TV. Teachers, like parents, are fallible. Thank goodness the vast majority of teachers are competent.
Teachers are not the best salesmen for a college education.
My high school biology teacher taught us the parts of the eye: the black dot in the middle is the pupil, the colored part around that is the cornea, and the white part around that is the iris. If I hadn’t learned the proper parts, I would have been so confused when Stargate:SG1 came out and they’d “close the iris” to stop someone from coming in.
Situations like that are teachable moments. If you don't know, teach them _how_ to find out.
"I'm not sure. Let's find out together (but without Wikipedia)."
Back in 1970 my mom worked for the assistant principal at the high school. One day a kid who usually came in because of causing trouble came to ask my mom for help. He said the math teacher couldn't explain & help with a problem & he was really trying to do his work so he could get a job he wanted. My mom got the advanced math teacher to help him. That teacher said the problem was the other guy was an education major. He said more and more teachers were getting a degree in education instead of getting a degree in a subject then taking the extra classes to get a teaching credential. Think how much things have gone downhill in our schools since then.
I would offer a graph of 1/x = y . The answer is there.
Some of my favorite teachers when I was in school were the ones that weren't afraid to say "I dont know" & then would look into the information in question. Then I would learn with them.
I was very fortunate to spend all four years of high school at a school where most of my teachers were excellent.
My teacher in Honors English 9, Mrs. W., was not especially fun or warm, but she also wasn't mean-and her basic attitude toward knowledge and learning was right. About halfway through ninth grade, Mrs. W. stopped teaching, for some reason (illness?). Her replacement for the rest of the year, Mrs. E., was the mother of one of my schoolmates. Mrs. E. was no dummy, and she seemed nicer than Mrs. W.-but her attitude toward knowledge and learning was pretty lame. After the end of ninth grade, I was happy to be done taking classes from Mrs. E.
By the end of twelfth grade, I'd had more opportunity to notice one of the particular things wrong with Mrs. E's approach. For all four years of high school, I'd taken some classes from Mrs. H.: she taught four years of French (of which I took three) and Journalism and A.P. English (for which I had her) and Shakespeare (ditto). For some reason, not even halfway through that school-year, the Shakespeare class was moved: Mrs. H. stopped teaching it, and now Mrs. E. taught it. (Maybe they knew Mrs. H. wasn't going to teach many more years, and maybe they wanted some overlap in which Mrs. E. could learn to be a Shakespeare teacher while still having Mrs. H. around for guidance.)
The point of my ramble here is the contrast between Mrs. H. and Mrs. E.:
• In _all_ the classes I took under Mrs. H., if anyone asked a relevant question (or even an only mildly related interesting question) and Mrs. H. didn't know the answer, her response was basically "That's a good question. I don't know. Let's find out"-and then we'd start digging in the books in her classroom, other kids would chime in with ideas, maybe someone would run to the library to look something up there.
• In _both_ of the classes I took under Mrs. E., if anyone asked a question and Mrs. E. didn't know the answer, her response was basically to toss you a not unkind combination of words and facial expression that nonetheless said "I don't know. Who cares? What a strange person you are, for wondering something like that", followed by something like "Let's get back to the text." There is value in staying focused on the task at hand-but, as I'm sure you can tell, I preferred (and still prefer) Mrs. H's approach.
Sitting in Mrs. E's class was not torture, but it was only something to tolerate (and to avoid if you could)-whereas Mrs. H. was a pleasure, for four years.
Those are the people who have earned the right to be called "teachers"
Sounds like you got wealthy teachers who didn't have to teach.
@@baltakateiit is called maturity and humility. Wealth has nothing to do with it.
absolutely right ! Makes the teacher relatable and closer to the students
As a middle and high school teacher I have no issue telling students that I dont have an answer, or admitting that when I am wrong. We have to model good behavior if we expect students to learn how to be adults.
Kids need to know that there are problems unanswered so far, and that one day someone will answer then and that someone could be them. A
I'm sorry to say that most public school teachers are modeling insanity and intolerance to our children and they are learning it very well judging by how the current generation is looting, rioting, burning, and beating people in the streets.
one ofbmy teacher was like that "hey, i dont know the awnser to your question but i'll search it" and then was always coming back with it or searching it with us if we had time :)
The problem is the teacher probably believed that the answer is 0, not that they didn't know
3rd grade teacher here, I have worked in various schools back when I subbed all the time. I have seen countless teachers who were pure ego, teaching nothing, but thought they were the masters of the universe. I try to give my students the tools to do well in higher grades and a happy childhood (2 things I wish I had been given). I hope when mine leave me they get a good teacher like yourself.
ive always been really, really...reeeeaally bad at math. and hated attempting it because of that, yet always liked it in general, as an aspect of existence, etc. anyway, the way you explain it, i actually found myself engaging. i'm still stupid, but i donno, the mixture of your calming demeanor, and teaching skills are splendid, and i am now a subscriber. probably your most math illiterate subscriber, i can almost guarantee that.
the most annoying thing is when someone starts cc'ng bosses to win an argument.
I feel like these types of Reddit stories are just made up, and the idea behind it is to get credit for how intelligent they are for knowing it's not 0 but undefined. But maybe I am just pessimistic.
Very common in British police forces, political parties, news organisations, etc...
It's odd how many teachers don't understand that WE ARE their boss.
@sci_ent_ificsui_neg9236who fkn cares.
Best thing you can do when dealing with delusional people lol. You know parents like these will file a complaint and this way the boss knows exactly what’s up right from the start
As I recall, anything divided by 0 is undefined.
“Never argue with an idiot. They will drag you down to their level and beat you with experience.” -Mark Twain
Twain had the best cameo in Star Trek ever.
I'm not supporting the teacher, but even I would tell the kids that it is zero.... Because they don't have to understand it at their young age, if you stuff their head with all the concepts of math then they will start to hate math even before trying.... A genius in math can become scientist and professor teaching 100z of students, but he will be a terrible teacher for young kids when they are still learning numbers..... Bcs he doesn't help them understand, but he will only make it worse....
@@ryuk4142 You shouldn't tell them that because it's wrong. Any finite number divided by zero isn't zero. It's infinity. It is quite literally the opposite of zero.
Besides, if you teach them that multiplication and division are inverse operators (which they are) it will confuse them more when you at the same time tell them that said inverse operators will return the same result.
@sci_ent_ificsui_neg9236 And eighteen Ukraine flags next to their X profile.
@sci_ent_ificsui_neg9236 … because 1/0 identifies itself as 0
I once got a question wrong on a science test concerning states of matter, we had to assign different things to their states, like water is liquid, a log is solid, etc. One of the objects on the test was fire, and the "correct answer" was that it was a gas. It was second grade, and I didn't know to explain to her that fire was a chemical reaction, but she marked it wrong because I said "none of the above". We really need to work on our education system.
Well, it is true that what we call Fire is a chemical reaction producing heat. But in the most common sense, the fire is mostly conducted in gaseous (or near gaseous) form and the result is mostly in gaseous form.
I think that this answer is mostly correct, if we ignore few facts and how exactly the question is asked...
@@georgidatskov2571Unsatisfying.
It is like asking what state of matter a driving car is.
You got solid, gasoline and gases.
I thought it was plasma. Is plasma considered a gas?
@@Nrt2Pnt0 No, it is not entirely plasma yet, albeit close to these energy levels. In some parts of the fire, where the temperature(actually energy, as temperature is byproduct) is high enough, a plasma state can occur.
Schools giving bunk information to students isn't accidental. They want a dumber population that can't think critically.
I worked in tile sales years ago and a lady needed some tile and after I did the math on the calculator for how much she would need she tried to correct me and got snobby saying she was a teacher. When she realized she was wrong she said she didn’t need help anymore. The second hand embarrassment was strong.
I had a similar experience, when proven correct I said I hope you're not a maths teacher with a chuckle, he was 😂
She could have easily apologized and own that mistake but ego us a sin at times
because instead of paying teachers we lionize them which attracts the neediest and most fragile people
@@Azereiah He's not wrong though, his example fits perfectly. Teachers will say a bunch of stuff that is factually wrong, due to ideology/stubborness/or whatever other reason.
@@12345678bobster His example fits perfectly? The discussion was about teachers getting math questions wrong and not wanting to admit it, and he brought up gender identity issues. How is that a perfect fit? Are you over there telling yourself you aren't pumped full of ideology, bud? What a laugh.
Thanks to you I suddenly remember how to do long division. Thank you. Forgot all that once I got out of school.
As a trained course supervisor in a past life, one policy we were taught was to never hide a mistake from the student. Reason: a mistake uncorrected in the student is then potentially repeated countless times by the student in application, leading to bad results.
NOT acknowledging the error and correcting it is the academic equivalent of crippling that student, potentially for life, on that lesson. It is an evil act.
Teachers that would rather protect their egos than do a little research to ensure their student gets the most out of the lesson have no business teaching anyone.
There were a few cases in my childhood where I still remember when a teacher gave inaccurate information and I corrected her on it. Needless to say, those acts lead to her spending the rest of the school year bullying me in front of the other students. And when I did correct the misinformation? The class was told I was in the wrong.
To this day I still resent that teacher and I'm damn near a senior citizen.
Only fair that her old bones are probably moldering
Even gameshows will correct an error on their part and either give back money lost or let a contestant play again.
@@dickjohnson5979 It has been a while since I have watched game shows, but I do recall this very thing happening. And always after a commercial break. I suspect either a contestant questioned it or one of their experts reviewing the game would question it. And would then follow it up. I've recall the game show evening giving credit if the answer was too vague and acknowledging a poorly worded answer lending to doubt.
I used to substitute and was certified in math k-12. The amount of teachers that would teach the kid the wrong thing was unbelievable. They should be ashamed of themselves
I’ll be 49 years old in a few months. When I was a kid I could not wrap my head around long division. I could always come up with the correct answer; just couldn’t explain it on paper.
My 5th grade teacher decided that I was just refusing to put out the effort to show my work and disciplined me by putting my desk against the back wall of the classroom facing the opposite direction as everybody else’s desks and would make me stay at my desk during recess and lunch. I was traumatized and shamed by the experience and never learned long division.
I use equations all the time in my work, but I have all of these hacks to avoid long division.
I’ve even been afraid of needing to know it and embarrassed because I don’t.
Until I watched this video today. I totally get it now. It’s so simple! Thanks, man.
Man, I'm sorry. Your teacher should have been fired and your parents should have talked to him/her.
i'll be 49 in five days and in my school district, that teacher would've been a goner for even saying something that humiliating to a kid. geez, my *mom* would probably have beaten the tar out of them personally. did you go to a crappy abusive christian school or something?
I've never grasped long division myself
Long division is functionally useless. It's a conceptual dead end, a calculation heuristic developed so people don't have to comprehend the principlesat play in division. Better to skip it and learn algebra.
I taught my students repeated subtraction first. They could reason out answers even when the algorithm for long division got confusing (fractions and decimals and money). Long division is the nonsensical shortcut we use that should never be taught until kids understand decimals beyond hundredths.
His marker skills are on point. Seamlessly swaps between colors without anyone noticing.
I noticed that too! Seamless switching
I know, right? I thought he had a real “magic marker” until I actually noticed he was holding both colours! 😅
Well... He is Asian after all
But we don't know, if it's by intention or just randomly.
Sure you do. Questions in blue, answers in red. Seemed pretty orderly, consistent, and deliberate to me.
If you have one of something and divide it zero times you still have one of whatever you didn't divide
That just feels like a weird thing for a basic math teacher to get wrong. I remember the longest running joke in computing being the disastrous consequences of making a machine divide by zero.
In Canada and USA at the third grade level there is no such thing as a math teacher. There is a third grade teacher that teaches third grade level subjects including math.
@@TristynRusselodepends on country and region. In third grade we definitely had math. It would seem weird to me if someone would not get taught math in elementary school.
@Max_G4 Probably depends on country. Where I live, we have a single teacher for the 1st 4 grades. Of course she's not a math teacher, but she teaches math. Along with native language, geography, biology etc.
@@Max_G4 I never said that third grade students are not taught math. I said that they don't have a specific math teacher. They have a general third grade teacher that teaches all subjects. That by definition, is not a math teacher, It's a third grade teacher.
@@TristynRusselo Funny how a 3rd grade teacher has a 3rd grade math level lol
We always learned that to check our division, we would multiply the answer by the divisor, and should get the dividend if our answer was correct. In the instance above, the dividend is 1, the divisor is 0 and the answer is (incorrectly) 0. Multiply 0x0 and you will never get 1.
Well, except for when you use extremely large values of 0…
(For those reading who don’t realize it, yes, that was a joke)
@@Ryarios - I remember when there was a software glitch in a program (maybe something with Microsoft) that you could get extremely large values of 1 (I think). It's been probably close to 30 years ago and I'm getting old, so I probably am not remembering correctly. I tried to find any references to it, but it was in the earlier days of the internet.🤪🤪
What if the dividend was 0? Would you conclude that 0/0 = 0 ?
@@azurnal7573 - No, because division by zero is meaningless. As explained in the video above, most other commenters, and the rules of mathematics.
Try not to be pedantic. It's not a good look.
@@frankhurst9665 @frankhurst9665 You used circular reasoning then.
To summarize what you said:
1. 1/0≠0 as dividend= quotient × divisor. If divisor equals 0, quotient × divisor does not equal to the dividend, therefore division by zero is meaningless.
2. 0/0 does not apply to the above formula as division by zero is meaningless.
This video reminds me that in second grade, my teacher was asking the class to share the name of any amphibian they knew of during a lesson. Having owned a book with many examples amphibians in it, I answered 'newt' with confidence. Instead of admitting she didn't know what a newt even was, she told me very flatly and with a frown on her face: 'No.' Thing is, newts very much exist and they ARE classed as amphibians. I knew something a teacher didn't when I was eight years old and she couldn't handle it.
That's all I was taught in school: anything divided by 0 was 0.
At the beginning, individuals go to school, but by the time they finish, they become a flock of sheep (except a few strong minds). States and countries prefer not to have thinking people, but rather mindless yes-men who are merely taxing, robots. (sorry for my English, I try to learn this language)
A similar thing happened with me and my chem teacher. We started learning organic chemistry, and I was so bored by it that I didn't pay attention. I instead learned it from the internet at home.
Thing is, the teacher was simplifying the chemical notations, so the "zig-zag" notation that's been used in chemistry for ages wasn't what she taught us. We had a chem exam, and me, being a dumb smartass, thought nothing of it and used the "correct" notation instead of her simplified one.
I got an F. She told me "my" notation doesn't make any sense. I then, in front of the class, told her she doesn't know basic chemistry. I was sent to the principal's office for it.
Long story short, I had to write a 2 page defense for "my" method with citations to have my grade corrected to a B (I hated chemistry, as you can imagine, no way I was getting an A) and still had to apologize to the teacher for undermining her authority in front of the whole class.
This was like 15 years ago and I'm still a little salty about it - at least I got the chance to redeem myself.
Teachers are NEVER wrong 🙄 When my daughter was 7 she wrote a story about pirates in which she used the word "pistoles" several times (a pistole was a gold coin used in Europe in the 1700s) in each case the teacher had crossed through the word in red ink and wrote, in block letters, PISTOLS!!
My daughter was obviously upset by this and together we questioned the teacher. She said "Well I've never come across that word before!" to which my response was "I'm sure that there are many words you have never come across before such as 'sorry' and 'apologise' but there are such things as dictionaries!"
My daughter was changing schools at the end of that session so we had nothing to lose!
@@WalintHUNthis is some wild statements to make. If you wanted mindless sheep and yes men you wouldnt teach them at all. The education system is flawed but to pretend its created by the state to keep us from thinking is ludicrous fear mongering that only the feeble minded would participate in
The ones that asked "why do we have to learn this" 20 years ago are now the teachers.
Only of they got an answer that made sense. Unfortunately, most of the people who asked this just didn't want to put in the effort. The classic example is people who complain about credit card debt, saying they weren't taught this at school: my response is "your high school math teacher never showed you the compound interest formula?"
I’m a 30 year old man… and this guy just taught me long division again. Thank you
Same. Made it make more sense.
@@BoomstickFTW yup, that brought back memories form 1975 3rd grade
Almost 30 but I swear I lost that ability before highschool honestly
@@MySkilletfan honestly I think I was the same way lol
I honestly don’t remember the last time I did it but I feel like it was like freshman, maybe sophomore year… maybe even before that… after that I was in like AP calculus and physics and stuff where we were always allowed calculators.
same, I haven't used long division in 25+ years. I do manual computations all the time for work, so this was actually very helpful to stumble upon lol
Hilarious. The principal, who likely has a Masters or Ph.D in Education, didn't bother to ask a competent math teacher.
Anyone with a masters or PhD should be able to do basic math & not have to ask , regardless of their field
Just a couple days ago, I was correcting a "language" teacher... And then again. And I just concluded "he must be primary school teacher" (aka generic knowledge)... And bam! I googled him, indeed not a "language" teacher.
@@dc1939why would someone with a masters in fine art know anything about maths? They'd have done enough to graduate high-school, and that's it.
Needing to ask in itself would be a failure, this is at the level of 1+1= ?
@@RacingAntthat's not university lvl math. You don't go much more basic than this. Any adult human being should know at least this much. Unless they are born with mental illness.
I once had a professor who said, "you divide by zero, you go to hell."
That's because you divide heaven by zero
LOL I love that