The Best Informative Youtube Channels in High School
Let’s be real — high school can get overwhelming. Between juggling classes, homework, and extracurriculars, it’s easy to fall behind or feel totally lost before a big test. But here’s the good news: there are tons youtube channels designed to help you work more efficiently, understand tough topics faster, and even boost your grades — without spending a dime.
Whether you’re prepping for an AP exam, trying to survive algebra, or just need help writing better essays, this guide has you covered. We’ve rounded up the best YouTube channels and free study tools every high schooler should know — no fluff, no paywalls, just real help when you need it most.
Mario’s Math Tutoring
This youtube channel is a goldmine for anyone who struggles with math concepts or needs extra practice outside the classroom. With over 1,000 videos, Mario explains algebra, geometry, precalculus, and SAT math topics in a clear, step-by-step way that’s easy to follow — especially if you’re the kind of student who needs to see problems worked out slowly and thoroughly.
Unlike fast-paced or theory-heavy channels, Mario focuses on practical problem solving and walkthroughs, often dedicating full videos to single problems or key exam questions. This makes his channel super helpful for test prep or last-minute review sessions.
Best for:
- Algebra I & II
- Geometry and Trig
- Precalculus & SAT Math
- Step-by-step problem walkthroughs
Recommended Videos:
- Algebra 2 Final Exam Review
- SAT Math Practice Test Solutions
- Graphing ALL Types of Quadratic Functions
The Organic Chemistry Tutor
The literal GOAT of all math and science-related topics. Whenever I didn’t understand a topic, I went straight to this channel for clarification.
He does a great job explaining all the concepts in a way that is simple to understand and gives good practice examples.
I once had a chemistry exam on phase changes that was literally the next day. I watched some of his videos and the concept immediately became clearer. Trust me. I’m not lying.
For people like me that don’t just get math or science right off the bat, having that extra step to dum it down helps a lot when it comes to digesting information.
Recently, he’s starting to expand his audience to elementary and middle school students. So now, you can find videos that explain fractions, decimals, and pre-algebra knowledge. I haven’t personally watched those ones, but I can definitely recommend you to check them out!
He does offer a paid patreon plan, but I find that his existing videos are already great as they are. The patreon only includes extra practice problems and niche topics, so for the average student, they aren’t needed.
Best for:
- Pretty much any math or physical science related topic
- Concept Clarification
- Explanation Videos
- In-depth guides
Recommended Videos:
Professor Dave Explains
This channel once again focuses on math and science, albeit, a lot more broadly than the Organic Chemistry Tutor.
He doesn’t go in depth into a specific topic, rather tries to ease you into the lesson by providing a general explanation or overview of the topic, basic concepts, as well as what to expect.
This isn’t to say that the content is bad, it’s just a different method of presenting the information.
I would not use this to completely learn a topic from scratch, as the videos don’t have enough information. He also talks pretty fast, so it might be hard to digest the information after you watch the video.
What I would suggest is to watch one of his videos before you actually dive into the topic. This gives you some general info, theories, and concepts that you can prepare for.
Alternatively, you can also use it to review key concepts in a certain chapter to gauge whether you grasped the general idea.
Overall though, great channel and I would definitely recommend checking it out if you have the time.
Best for:
- Pretty much any STEM topic
- General overviews
- Quick summary/review of certain chapter or topic
- Beginner concepts
Recommended Videos:
Old School Chemistry
A fairly new channel, I came across this during the pandemic. As the name implies, yes, the channel is all about chemistry.
What makes this different from the other chemistry youtube channels is that she breaks down all her lessons by chapter, and clearly explains each concept. She even goes as far as to make separate videos for EACH practice problem she does. Now that’s dedication.
She isn’t short of qualifications either, being an organic chemist for 6 years and having over 15 years of teaching experience under her belt. It’s safe to say that you won’t be failing any chemistry exam if you watch her videos.
One major thing I feel many videos lack these days is that enthusiastic tone and desire to teach. Many of them will do a voice-over or write a script for an AI to teach you. It just isn’t engaging at all, and it gets boring really easily. Having a bot talk to you also makes it hard to focus because of the insanely monotonous voice.
But this teacher completely changes that. All her videos are full, unedited clips of her explaining each lesson in front of a camera. No graphics, images, nothing. Everything is prepared by hand and she explains it beautifully.
Ok, no more talking from me. Check her channel out ASAP!
Best for:
- Chemistry
- In-depth explanations
- Topics/Chapter-specific guides
- Practice problems
Recommended Videos:
- Determining Rate Law from Reaction Mechanisms
- Potential Energy Vs. Internuclear Distance
- Coulomb’s Law
Teaching Website: leanthink.org
Heimler’s History
The go-to channel for all things history related. This man alone covers all 3 history AP’s: World History, US History, and European History. He gives great in-depth explanations on specific topics and provides great tips for the AP exam.
Being a teacher himself, he actually created a 30-day cram guide for students to use to study for the AP exam. They are completely FREE, and it guides you through each of his videos that break down each section of the AP exam.
One thing I appreciate about him is that he takes the time to actually help you study what will be on the actual AP exam. You don’t want to be studying everything, rather he explains what time periods you should focus on more and HOW you should be studying.
Overall, one of the best youtube channels in the history niche and I highly recommend for anyone that is taking an AP history class of some sort to watch his videos.
Best for:
- Comprehensive guides
- All AP history related exams
- Tips and tricks for success
- Full break down of AP exam parts
Recommended Videos:
FREE 30-day Guides:
Mr. Sinn
Jumping into the social sciences, this channel dials into the topics of psychology, human geography, economics, and sociology. Once again, like Heimler, he also offers review guides that are very informative and comprehensive.
He mainly focuses on preparing students for the AP exams, but I still believe its a good resource for anyone looking to know more about the topic.
Each section is divided into their respective units, and is split by their category. Their really isn’t that much to say, other than the fact that its just a very good guide.
While many youtube channels may only tell you the WHY, he explains the HOW. You need to understand the underlying theory and concept first before memorizing.
I would say that this is the Heimler of the social sciences. Funnily enough, he also has videos that are sort of satirical in a way that is completely unrelated to the AP exams. I would highly suggest you watch those videos for some comedic relief if you’re feeling stressed on any given day.
Best for:
- Social sciences (AP Psych, AP Human Geo, Sociology)
- Comprehensive review guides
- AP Exam Tips and Tricks
Recommended Videos:
Review Guides:
Crash Course
The jack of all trades in the educational world, pretty much every teacher I know has used crash course at some point. They offer pretty much every single type of video you can imagine covering history, math, science, arts, etc., and even sex ed. Pretty much anything that you can think of, crash course has a video on it.
Albeit, it’s a very general and vague description of the concepts, and it is targeted to around late elementary to middle school kids. However, because of its target audience, the content is pretty simple to understand and they dum it down a LOT so that ordinary people like us won’t get lost.
They are, as always, very engaging, utilizing vocal variance in their videos as well as interactive graphics that help visualize a concept.
Realistically, for those that need a video to give a brief overview of a chapter or need someone to break it down into simpler terms, these are the youtube channels for you.
Just beware though that most of the videos go at a very fast pace, and you might need to slow it down a little so you can actually understand what they’re saying.
And of course, my boy John Green is the absolute G.O.A.T of the channel and I would definitely recommend you check out his crash course playlists.
Best for:
- Simple review guides or explanations
- Virtually every topic in existence
Recommended Videos:
- Computer Science
- Anatomy & Physiology
- Ecology
- Chemistry
- Biology
- World History
- US History
- US Gov and Politics
Bozeman Science
Once again, another great resource for people in STEM. Run by a person named Paul Andersen, he creates videos on the essential topics of many subjects and is perfect for those looking to review a chapter.
The explanations are very concise and easy to understand. I think he does a beautiful job condensing all the information so that it is digestible.
On the plus side, he also offers review material for AP Biology and Environmental Science which is few and far between. I rarely find youtube channels that have videos on those subjects and I normally have to scour the internet far and wide to find quality content.
Yes, the channel is a bit older with many videos being recorded around a decade ago, but most concepts are still relevant today.
Besides the life sciences, he also offers review guides in physical science like chemistry and physics.
On the contrary, the channel is starting to focus more on Paul’s personal life with recent posts diving into emotional well-being and what he does everyday. Its a stark shift to the videos he was making before. Nonetheless, its a great way to show vulnerability to your audience and relate to them.
Overall, I would suggest watching some of his videos to get a feel for his style of teaching. They are highly informative and definitely a hidden gem in today’s society.
Best for:
- Life sciences
- Fun and engaging explanations
- Vlog style videos
Recommended Videos:
General Study Support
Also, I wanted to mention that there are dozens of online resources out there that could help you out. From time management to study tips to subject specific guides, they have it all.
The one I would recommend the most for high schoolers is Khan Academy. It’s been around for quite some time already, and has a lot of resources for students.
They have math, science, humanities, etc., pretty much every single subject the average high school student would think of. Incorporating a mix of videos, worksheets, and practice exams, they pretty much cover an entire topic.
With all that said, I wouldn’t use this as a replacement to what you do in school. It should be a SUPPLEMENT not a replacement. For instance, the techniques and methods used to solve a math problem might not be what you’re used to, but the concept could be made clearer after watching a video.
Additionally, they have practice exams. Whether it be for AP or just a regular English class, they set up checkpoints and benchmarks to guide you.
On top of that, they are also endorsed by Collegeboard, offering free SAT prep material. For those of you that are looking for studying resources, this is one of the most accurate you can find on the internet.
Use These Resources!
All of these YouTube channels are packed with quality content that can help you better understand school subjects, review for exams, or even stay ahead in class.
Let’s face it — high school is challenging, but the right tools can make it a whole lot easier. From The Organic Chemistry Tutor’s deep-dive science breakdowns to Crash Course’s fast-paced overviews and Heimler’s AP history game plans, there’s a YouTube channel out there for every kind of student and study style.
Whether you’re looking to prep for an AP exam, master tough math problems, or just need someone to explain a concept in a new way, these channels are free, effective, and ready when you are. The key is finding what works for you — so don’t be afraid to explore, subscribe, and build your perfect study playlist.
🎯 Ready to level up your learning?
Check out the channels above, start with a video that matches your current class, and don’t forget to bookmark this post for your next test week. Your future self will thank you.
👉 Need more productivity tips and study tricks? Browse my other blog posts for tools to help you stay organized, focused, and ahead in high school.
