The Nucleus: Crash Course Chemistry #1
Вставка
- Опубліковано 7 чер 2024
- Hank does his best to convince us that chemistry is not torture, but is instead the amazing and beautiful science of stuff. Chemistry can tell us how three tiny particles - the proton, neutron, and electron - come together in trillions of combinations to form ... everything. In this inaugural episode of Crash Course Chemistry, we start out with one of the biggest ideas in chemistry ever - stuff is made from atoms. More specifically, we learn about the properties of the nucleus and why they are important to defining what an atom actually is.
This video is available in Spanish on our Crash Course en Español channel! Watch it here: • El núcleo: Crash Cours...
Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App!
Download it here for Apple Devices: apple.co/3d4eyZo
Download it here for Android Devices: bit.ly/2SrDulJ
Table of Contents
Intro 00:00
Einstein & Atoms 02:05
Composition of Atoms 03:18
Atomic Number 04:20
Isotopes 08:04
Relative Atomic Mass 07:26
Mass Number 07:44
Watch the SciShow episodes on the Strong Nuclear Force here:
• Strong Interaction: Th...
• Strong Interaction: Th...
Crash Course is on Patreon! You can support us directly by signing up at / crashcourse
Want to find Crash Course elsewhere on the internet?
Facebook - / youtubecrashcourse
Twitter - / thecrashcourse
Instagram - / thecrashcourse
CC Kids: / crashcoursekids
Pssst... we made flashcards to help you review the content in this episode! Find them on the free Crash Course App!
Download it here for Apple Devices: apple.co/3d4eyZo
Download it here for Android Devices: bit.ly/2SrDulJ
Fun fact: I stopped watching all Vlogbrother related material 3 years ago. I'm back now watching CrashCourse and SciShow to increase my knowledge of science to help me out when university starts in September.
I’d tell a chemistry joke but all the good ones argon.
youre right they are, becayse this ones overplayed
They're getting kinda boron
You're name is a joke
I want to shoot mice elf
In high school, I was very excited to take a Chemistry class. However, a few months in, it became my least favorite class. A bunch of the more rowdy students hijacked the class and often distracted the teacher - I learnt nothing, and it showed on tests. I eventually came to dislike Chemistry, treating it as a dirty word. But now, only one video in, a decent teacher has reminded me exactly why I was so excited in the first place.
Thank you, Hank!
SpadaccinoLuciano I want to teach you Chemistry, but please, do not run away screaming.
SpadaccinoLuciano The EXACT same thing happened to me 8 months ago. Thank God that class is over with...
Exact same thing happened to me!
I never liked chemistry but now, i am a little more curious about it
Did your school not have prerequisites for chemistry? At my high school, a student could not enroll in chemistry until they had completed algebra 1 and geometry, and could not enroll in physics until they had completed algebra 2/trigonometry. This had the effect of weeding the disruptive students out, as they were still languishing in pre-algebra or remedial arithmetic.
Pollen: _jiggled randomly_
_RANDOMLY_
Einstein: *GOD DOES NOT PLAY DICE*
this
Lmao
Helium walks into a bar:
Bartender: "We don't serve noble gasses here!"
Helium doesn't react...
Okay that is actually really good
Apparently, Helium didn't want to interact with anyone....
Noice
Great resource and makes Chemistry fun and lively.
Oh god lmao
Why is it that someone who isn't actually a teacher is a better teacher than real teachers?
+dennis robinson because he does it out of genuine love and interest in the subjects he speaks on and for educating others rather than for a paycheck.
+dennis robinson A lot of teachers forget how important it is to educate, and just spute knowledge after a while.. I guess this guy has the ability to maintain the right intentions.
+Ategra Good point.
+dennis robinson Because teachers in the public school system are generally useless.
Education now is about money and a letter grade. Teachers want you to memorize so they can fulfill their given requirements. This is to help you learn and understand the topic.
Gonna throw this here for anyone who wants it~
1:48 Atomic Theory
2:34 Brownian (spelling?) Motion
4:22 Properties of the nucleus
7:32 Relative Atomic Mass & isotopes
8:44 Chemical Symbol
horsecrazy2266 idk if you're blind but..... 9:40 summarizes each topic of the lecture that he have covered in the entire video
Dopa44 I know.. It still looks different than this one though. He doesn't really use the terms in the explanations
+horsecrazy2266 yayy thanks!
Vaishali D you're welcome :)
+horsecrazy2266 Brownian is spelled correctly.
I like how instead of watching the video I’m scrolling through all the chemistry jokes in the comments
2:23
"...that the 'matter' was truly settled."
I SEE WHAT YOU DID THERE, HANK.
VERY CLEVER.
Wooosh but ok
"but it wasn't until Einstein mathematically proved the existence of atoms and molecules ... that the MATTER was truly settled" +1 to the writers
Lol, I've watched this video a million times(mainly for fun😊) and I never noticed that...😐😐 😳😊😆😲😯😯
Kitkat915e that went right over my head! Lol
woaaaah
Every student is praying for Hank to be their teacher
So true 😅
Who is hank
Talking tom and friends
@@rosenielogrono4522 the guy in the video presenting chemistry
Hank is cool he inspires me
this guy is everywhere he is smart... and the way he teaches is amazing...
How this guy looks like 18 and 40 at the same time??
You should totally make a series on mathematics. I need that, and I'm sure a lot of other people do too!
blackkittyfreak That's what PatrickJMT is for
***** I wish more people used khan academy, I love it.
blackkittyfreak I completely agree. I need it lol
blackkittyfreak and physics
If you're in high school or under, you can do TTM. Just ask your parents and they'll enroll you. It's good because if you don't understand a topic, they'll send you to a live teacher that can help you through video chatting (or if you don't want to do that) typing. :)
An ion walks into a bar and says to the bartender: "I think I lost an electron on the way in."
The bartender says: "Are you sure?"
The ion says: "I'm positive."
***** lol
+Zachary Sikes ok I got one
A blind man walks into a bar...
A chair and a table
+SimplexTV Schrodinger's wife is carrying their offspring that has yet to be born. a man stops and asks "is it a boy or girl?". Schrodinger says "both"
Apollyon are ions always neutral then?
Simplex me 2 :p
Hank: protons, neutrons, and electrons make up everything
Me: *laughs in quarks and particle physics*
lol first word's "please dont runaway screaming"😂😂😂😂
CRAZY BULL he says that often
Most American kids
Literally me
I did
i just straight up closed the window
That nerd who watches this during the summer to get a year start before chemistry on the fall....
Hahhaa. Me...
I'm trying to learn it over the summer so I don't have to pay attention next year
Literally me
Meeeeeee
every reply here, including me XD
Teaching is easier when there are no students in the room.
Then what's the point of teaching
@@neo4544 Distance learning is a thing; I don't think he meant it sarcastically. Rather, I think he means when the teacher can avoid topic shifts from group discussions (which is essential when you are teaching people in person) they can teach more, much more effectively, in a much shorter time.
All the visual aides of video just make it that much better
Michael S private classes?
But you don't get to teach the class then
True
Back in my sophomore year, my teacher never taught us any of these. Instead, of actual chemistry lecture, he gave us articles and forced us to highlight, annotate, and write an essay about it ( more work than my actual English class). Now I have to take a Chemistry placement exam in one week, and I glad that I found you guys or else I will fail and have to pay for more classes in college.
Is it bad bad that I've seen this series like 6 times already and have not gotten bored of it yet.
pretty cool!!
dedication is watching all 46 videos before finals
same
doing that now lol
Lol this comment has 46 likes
mine are next week and here i am struggling
64 actually! LOL
Me: Sees 8 hours of video material about chemistry, most of which I might have to watch at least several times to fully grasp what's going on
Hank: Please do not run away screaming!
We need more people like you to teach in the field of science
Honestly, if I was taught like this I would pursue a career in the field, it's still not too late for me tho, I'm 17
Why can't high school teachers be this good... At teaching?!
+Justin Walker probably because they dont really like their job, or that they are underpaid, or underappreciated/underrecognized.
heck, probably all of the above.
+BattousaiHBr Not having a class full of teenagers in front of him also works in Hank's favour.
because they have to repeat the lesson for so many different groups of students.
Because government backed one-size-fits-all education is based on necessitating dry, boring wrote memorization in a system that ironically doesn't teach/drill methods of mnemonic retention. In other words public education doesn't do "edutainment" very well.
Grossly Incandescent i miss katanagatari
Coming back to the first video to say that, as a Chem major, this was a great series for Crash Course. Shout out to Hank for doing a stellar job as usual. CC, have you ever thought of doing a series with Hank on Science History? A series where each video explores the life and accomplishments of notable scientists such as Einstein, Newton, Goddard, Tesla, Copernicus etc. would be awesome to see from you guys. Looking forward to whatever's next for CC!
that is an awesome idea!
I’m 12 and honestly I think chemistry is REALLY interesting. I know about nitric acid, potassium nitrate, capsaicin, and some more but I don’t know the basics of chemistry so that’s why I’m here 🤷🏻♀️
me: is actually just interested in chemistry and isn't taking a class
I am currently working on making notebooks of notes from all of the different Crash Course series in order to gain a better overall understanding of each subject. I am starting with chemistry. Wish me luck!
I'm doing the same thing!! I love Crash Course!
+BenCubed im using this for GED prep (:
***** you know it
Haha I do the same but I also try to use other sources (like Khan Academy) for my notes because one source is usually not enough, but it really gets quite exhausting sometimes.
+BenCubed can i get a copy of the chemistry notebooks?
Crash course makers....can u please make a physics crash course? I will be taking AP physics for my junior year in high school this september. Right now im having a difficult time understanding the summer hw.
I second that. my chemistry professor describes it as "advanced chemistry"
Kris check out Bozeman Science. Paul Anderson has AP physics lectures that are not quite as crazy but easy to understand.
Mathematics would be cool to for calculus and such.
Yah That Would Be Cool
That'd be awesome! Check out Bozeman Science, Khan Academy, and Michael van Biezen! To me they're the best online!
After seeing many videos the thought that i am getting is to just dropout school and just study from Crashcourse. Hats off to Hanks great work.
I'm taking chemistry for the first time virtually through my college and I have been nervous. This video helped out so much. Thank you, Hank!
Teach for a million years and then keep teaching. That excitement for your subject is so crucial and yet so rare in educators.
I can be home schooled by this xD
+Leo Oh You would develop a very annoying accent.
+VD and LD Gaming lol still helpful though
+VD and LD Gaming What do u mean?
+Leo Oh You and me both! I have my exams this week and the only revision I'm doing is this...
+Leo Oh I am being homeschooled by this. xD
to those binge watching for the AP chem exam tomorrow.... i wish us all good luck
People in the comment section, fret not if this is your first time coming to crash course. We all have to get used to Hank and John talking as fast as they do and anyways, there is a reason this channel is called "CrashCourse". It's meant to jam information and facts down your throat at the speed of 3 words per second. I think...
Why you people cant understand what he is saying? I am not American but I can understand what he says very well.
Landau Martin Because in some language, people talk fast (like Spanish and Portuguese) whilst others have a slower pace.
Hey guys, did you know that you can cool yourself to -273.15ºC and still be 0k?
*-
NO. PLEASE, NO.
Mwa ha ha ha ha ha.
ahahahaah xD
This is completely wrong. 273.15 C is not 0K it's 546.3K. 0C is 273.15K though.
00:05 "give me five minutes"... ...talks for more than 10 minutes
2:06 Atoms are just a theory... a *_science theory._*
Thanks for watching.
@Lucarrie +MatPat
I was studying Chemistry on Khan Academy. It got boring so I thought "Screw this, Im going to Crash Course". 100% ENJOY THE VIDEO.
+Tool Time Team Defense Fort 2 me too. I love Sal, but the other guy literally put me to sleep, Thankfully I found these videos!
I use both -- one source usually isn't enough!
+Alduin, Firstborn of Akatosh I use both too. Usually I start from here first, then for detail I go to khan academy.
+Ira Bakri I read the reference books, watch this when I am bored (last 10mins) and finally Khan Academy if I am unable to understand some concept.
Will the 46 part course just give me a good basic foundation in Chemistry so I can both understand the Natural World better and impress people . Not looking for his 150 math intense video on Chem but rather just the topics and an overview
this is my method of studying for finals
Dazed & Confused me rn
same
I want a stable relationship like the the number of protons in a nucleus
Hope I’m not the only one watching this during the summer trying to get ahead to make chem easier this school year 😂
your the only one 😥
yassienE4935 real ones are watching now to study
Megan Marie I wish I had videos like this in HighSchool.
No, I'm in 7th grade and watching it for fun!
lol naw I'm just bored AF
GOOD LUCK TO EVERYONE TAKING THE AP EXAM TOMORROW YOU WILL SLAY
+김혜린 AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
I NEEDED THIS SO MUCH THANK YOU BLESS YOU
I'M PRETTY SURE I GOT LIKE A 2 WTF WAS THAT FRQ
your name looks like your from japan, but somethings transend oceans, and stuff, like APs and finals. hello froom texas
XD that's Korean actually!
could you guys please do a crash course on physics !!! PLEASE
Yes pleaaase physics >.
yes yes, this
They did
@@adarshtiwari4256 my friend these comments for 5 years ago :D the course physics is new :D
"chemistry is not torture"
4 months into chemistry, I beg to differ xD
why dont you like it so far
Same I'm interested in it dunno if chemistry interested in me or not
Nahh imma have to differ your differ-ance there
Chemistry is not torture, bad teachers are torture.
The minute I saw this dude I know I'd learn and understand. Thanks dude you're the best
random guy: i bet you cant solve this mystery
Einstein: hold my beer, watch this
+Dark Side Gaming n1
CHEMISTRY?! * runs away screaming *
CHEMISTRY FTW!!
CHEMISTRY?! runs and cant find a cliff so jumps off a park bench THE END! (not really scared of CHEMISTRY [sorry caps lock])
I'm a 9th grader , in my country ,when we Ascend to 10th grade we start studying each branch of science partially , well , I just can't wait especially that chemistry has been on my mind for so long since I was a a kid and finally decided to start studying it and tbh your way of teaching is incredibly great and simple ! Thank you very much , I hope everyone who's also here to learn have fun going through this journey ♥️
And in just a span of ten minutes, I learned more stuff about chemistry than I ever did back at school.
"There's nothing that helps you understand the world better than chemistry"
PHYSICS
P H Y S I C S
*PHYSICS INTO THE DISTANCE*
Everything is made up of atoms tho....
Hey but physics is cool too
quantum physics! :D
Good luck understanding your chemistry and physics without... MATHEMATICS. God tier achieved.
Yeah but math helps you understand the things that help you understand the world. Math doesn't help you understand the world itself. So your point is moot
DANG IT CRASH COURSE TEAM!
I should be studying for my American History test! Not learning new and intriguing information that is relevant to *basically freaking everything* on this planet.
There's a Crash Course for American History too ._.
9ssgoku
Yeah, and I use it. But there's just something about learning for the sake of learning that makes it so fun. Not as much with learning for the sake of passing a test.
Did you hear about the wedding between Oxygen and Potassium?
Neither did I, but they said it was O.K.
That intro was a hook
And I'm here for it
I love science but my teacher can't teach
That nerd who loves chemistry and watches this for no reason at all...
Not because she has a test on all of this in the next 12 hours....
That's me, though I'm a boy
I'm that nerd
i- why do i feel so seen
Im actually that nerd that watches it for no reason
And takes notes too
Thats me. And I'm on my journey in becoming a chemist soo
Why did the science teacher and the biology teacher break up? Cuz they had no chemistry
Wait....Isn't Biology a part of science?
@Ananya r/whoooooosh
Ishaan s but chemistry is apart of biology. Chemistry is apart of basically all of the sciences
You did not ...
@@ananya5564 she means feelings and love 👀🌝😂😂😂
Coming back to watch this series again because this was the only reason I passed Chem and now I'm actually going to school for biochemistry!! This series made me love science again
Chemistry/ Biology and just science in general has always been my favorite subject. Thanks for making it more fun
I actually like chemistry, I don't understand why people hate it.
because physics is better
because physics is better
Because some of the concepts can be hard to understand, and, with the wrong teacher, are impossible to master.
lol he is mr BEAN
+Branflakes1522 just like my teacher..
I love these series so much! It's like supplementing an extension to my chemistry professor's lectures. Thank you!!
***** omg YES ^
*****
well......sometimes
I love this course. It's been a favorites playlist for a while for me. I constantly come back to re-watch this course.
Have been out of class for a long long time. Watching this as a refresher... six minutes in and I'm extremely amused! Could see myself binge watching all these videos for days. I love how the humorous references really help the concepts stick.... LOVE IT.
I'm running through this course now for pure recreation; stopping, repeating lessons, and taking notes along the way. I really have to say that these are nothing short of amazing! Hank acts as a brilliant broker of knowledge between the worlds of academia and the layman. For me personally this has been as exciting and as accessible as my experiences with Brian Greene, Charles Van Doren, and Carl Sagan. The enthusiasm and humor keeps me fully engaged at a constant clip, not to mention the sharing of this information broken down into something highly digestible for the masses is downright inspiring.
wait! does that mean that Horton Hears A Who is basically explaining Atoms???
Kaitlyn Says Hi My life will never be the same
ya and the male tiny people are protons and the female people are neutrons
yassienE4935 who was the electron? The family pet?
@@applebobbb6321 the electrons are the stoner uncle
You have helped me with chemistry, neuroscience, philosophy, and hopefully more to come. Thank you very much for these wonderful videos!
Well, Hank...you are great... You summed up weeks of chemistry cramming classes in one 10 minute video of Crash course chemistry!
PLEASE make biochemistry videos
BioChem sucks just take regular Biology and then Chemistry, assuming you can.
(I took Physics in 8th grade and thought BioChem was something different.)
Cynical Trash even if it might have sucked for you, biochem is necessary for many careers especially pharmacy so I think a lot of us would find biochem videos helpful
YES!
"Hi I'm Hank Green and I'm going to teach you Chemistry."
*starts crying because is failing Chemistry*
Pleasseeee
I finished high school few years ago and I gave up studies because there were several bunch of topics I literally couldn't understand. Went for some after school tutorials and didn't help. I felt I had properly gotten really dumb. Now studying has been on my mind and didn't know what to do and I came on UA-cam to check videos out.
Thank you for this amazing channel and I'm learning a lot. But please is there like a community where I can post questions and get answers.
Whoa! your videos actually keeps me stick towards the subject, no matter how much the boring topic it will be.
Thank you so much Sir for your efforts. I am very much grateful to you.
Blessings from India. :)
I just learned more about chemistry in this video than I did in my first semester of chemistry in highschool. Part of that truth lies with my will to actually want to learn more, and part of it has to do with how well this was edited and produced. I'm subscribing for more education and knowledge!
NOTE:
The occasional restating and review of bits throughout the video and in the end made a huge difference in my ability to retain and understand the material. Thanks for that!
The opening never failed to make me cry. The subject Chemistry is so underrated. And most people aren't interested in it and giving Chemistry a bad reputation because of 'Chemicals' .
I love Chemistry :')))
I started training as a physics lab technician and have to take chemistry as well so I'm back watching the chemistry crash course again. I tried to watch through the chemistry course last year but had trouble understanding everything (last chemistry lessons in school were like 8 years ago and English isn't my native language). I'm gonna try get through the whole course this time!!
Thank you Hank and whoever is involved behind the scenes. This is such a great help. More power!
so I'm going into chem next year so i decided to watch all the crash course videos to prepare myself
Me too
same here
That'd be me as well
I'm 13 but I've been watching and reading things on chemistry and physics for about a year or two. So when I do start chemistry it will most
Likely be easy.
And also me! :D
I feel like I must take a test after Everytime I watch a crash course video in order to make sure that I understood and remember what I'm being taught.
Your videos are really inspiring, whenever I feel like I'm sick of school I watch them and they remind me how beautiful science is, thanks a lot
I love these videos
What I remember of chemistry is my teacher making me memorize the periodic chart, and she never explained to me what the hell was the meaning of these numbers and symbols.
I remember lithium (I think that's "Litio" in english) I think it's the first one too lol. I ended up studying physics and maths.
I wish that everyone who criticizes teachers becomes one. If you can see what they are doing so obviously wrong, go do it right. That's what I did, and I teach chemistry the way I wish I had been taught. Zero complaints, lots of love from my students.
that the "matter" was truly settled
hehe,,,
helium
Ran Shibuki lol omg i thought the same thing
Hank: there is nothing can let you understand the world better than chemistry
Physics: hold my beer
Well, physics is great for undestanding nature and the Universe, but chemestry will help you understand the World around you better, every single thing arround you has atoms and molecles and propieties and you can only undestand them with chemestry. Physics is more general, and it's better if you want to find a "Theory of Everything". But chemestry is the tool for studying more deeply specific things down to the individual molecules
So glad this video exists! I skipped the grade when chemistry is introduced in my country’s education system, so I never got to learn it properly. Now at 23 yrs old I’ve finally accumulated enough curiosity to do this!
I'm going into Honors Chemistry next year and I plan on watching this entire series so I can be ahead and understand everything better.
lmao same
Samee
Same
I took Honors Chem as a freshman and just to give you some advice don't go beyond episode 30 in this series because then it gets more into AP chemistry stuff, unless you're planning on taking that later on. Stoichiometry is a big part of it so try focusing on that because a lot of the conversions you will be doing will rely on that. Good Luck!
+Umar Patel thx
I always avoid looking at science stuff at the break time but , with this channel I spent all my break time at science episodes .
which is a very good thing by the way .
keep it up the guys you are the only one in the world who made science and knowledge funny and interesting
That's my 4th course I do with you guys, what you do is just beautiful, thanks for all that passion and good vibes 👏🏻
I always knew this guy as a history teacher, but the crash course format works so well for all kinds of stuff apparently! The way he makes sure everything is well understood through definitions and clear language really helps.
The one who did the history ones, iirc, is John Green, his brother
"don't take a break from school, because you'll forget everything that you learned." "you are making a mistake," they said. What I have to say to those people: No I'm not. I'm smart enough not to let myself end up like you guys. Not rushing through college wasn't your mistake. Marrying somebody you don't love, blowing your credit card, etc. were your mistakes. Not everybody has to rush through college to be successful.
I understand their points, but I get yours too. Personally I'll probably be forced to take a brake since there's deadlines for college applications and I'm having problems getting my transcript, but I don't plan on it.
10 mins covered 2 hours worth of lessons I didn't understand!!! Thanks CrashCourse
I learned more about chemistry in this first video then I did in my high school chemistry class last year. (It looks like a lot of people in the comments agree with me) Thank you for doing this, it inspires me, and makes me want to be a better student.
I can't thank you enough! I really need chemistry in order to pursue my goals further in life, and I have hated it for a long time. Just as I clicked on this video and you started talking I decided to forget everything I know and start anew. I am motivated now. May the strong force be with you!
Do Crash Course Quantum Mechanics lol
Yes please!
+Jay Rad Indeed, I'd like to throw my vote in a similar direction: A general physics CC series.
+Jay Rad DANGIT! I swear you read my mind because before i even clicked the video i knew i was gonna comment that
+Jay Rad that would be pretty fun but the problem is that since a lot of things in QM are only hypothetical, it might not be the best thing to teach
+Jay Rad I hope so!
I think that Crash course should teach physics, i mean they have done Biology and Chemistry so why should they neglect physics. In my opinion Biology and Chemistry are the best but Physics is so much more abstract and not a lot of people understand it, plus it requires so much math and if some of us here want math instead of physics we could learn both subjects along the way
Physics is the next science once Crash Course gains enough money on Patreon.
+Fds Chan Yeah, well the mathematics part is what makes it so much more interesting than any other fields if you ask me. I excel in mathematics, so it seems like something that would be easiest for me to really get into.
+Fds Chan I would LOVE Crash Course to teach math. I'm so bad at math *sigh*
im not bad but i would definetly say there is room for improvement for me.I really know what you mean though. Erulasse Aranel
Fds Chan Yeah, always a good thing when math is interesting ^u^
www.d-e-f-i-n-i-t-e-l-y.com/
I know this series has been out for years, but I think I'm gonna start watching it. Crash Course has a history of providing really useful and important information through entertaining and efficient teachers who aren't even real teachers. In ten minutes or so, Crash Course can teach you something it would take a week or more to learn in school.
Chemistry can literally blow your head.
This is the only good joke here u need more likes
That moment in life when you have to rely of CrashCourse last minute to pass the exam tomorrow.
lmao it's the middle of summer and i'm not even in school but i'm taking notes on these videos because they're so unteresting
This series helped me a lot with chemistry competition! Thank you so much :D
This is the most intresting class I've ever taken😐never thaught learning could be fun😐I'm shocked 😍thank you
Thank you so much I love this series! Although I think this show would be even better if you gave us worksheets or something to practice what you have taught. Like attach a pdf link to some problems and review as we go along.