Courses
Science
60 free courses in Science. Mathematics, physics, chemistry and biology, solved rather than only explained.
Courses to get you started
All free, all made by people who teach in public.
Crash Course Geology
by CrashCourse
3h 38m · Beginner
April 2026
Free22 lessons
Biology
by CrashCourse
10h 48m · Beginner
May 2023
Free51 lessons
Ultrasound physics
by Radiology Tutorials
6h 9m · Beginner
March 2023
Free26 lessons
Ultrasound physics course
by Radiology Tutorials
6h 9m · Beginner
October 2024
Free26 lessons
All Science courses
Nothing here costs anything. No card, no trial, no account needed to watch.
Crash Course Geology
In 25 episodes, we’re going to learn about geology—the study of Earth’s physical structure and processes. Our host, Sage, will teach you about the geological forces and cycles that shape our planet’s past, present, and future. This content is based on an introductory university-level curriculum. B
by CrashCourse
3h 38m22 lessonsBeginner1.4M views
Free
MIT 18.642 Topics in Mathematics with Applications in Finance, Fall 2024
Instructors: Dr. Peter Kempthorne, Dr. Vasily Strela, Dr. Jake Xia View the complete course: https://ocw.mit.edu/courses/18-642-topics-in-mathematics-with-applications-in-finance-fall-2024 YouTube Playlist: https://www.youtube.com/playlist?list=PLUl4u3cNGP601Q2jo-J_3raNCMMs6Jves View previous versi
by MIT OpenCourseWare
26h 12m22 lessonsIntermediate1.5M views
Free
Biology
In 50 episodes, we’re going to explore biology—the science of life. Dr. Samuel Ramsey will guide you through life’s vast interconnectedness, telling lesser-known stories of biologists along the way. We’ll discover how evolution, genetics, ecology, and cell and organismal biology deepen our knowledge
by CrashCourse
10h 48m51 lessonsBeginner14M views
Free
MIT 18.200 Principles of Discrete Applied Mathematics, Spring 2024
Instructors: Prof. Ankur Moitra, Prof. Peter Shor, Susan Ruff View the complete course: https://ocw.mit.edu/courses/18-200-principles-of-discrete-applied-mathematics-spring-2024 YouTube Playlist: https://www.youtube.com/playlist?list=PLUl4u3cNGP61p2fXeXjNCrfNHFwyW-bl0 This course will teach you ill
by MIT OpenCourseWare
24h 42m20 lessonsIntermediate165K views
Free
Cambridge IGCSE Chemistry 0620
Cambridge IGCSE Chemistry 0620 for exams in 2023, 2024 & 2025
by IGCSE Study Buddy
7h 57m43 lessonsIntermediate4.2M views
Free
MCAT Biology
UTD. Twice a week. Gap year M4. All gas, no brakes.
by Yusuf A. Hasan
20h 32m20 lessonsIntermediate836K views
Free
MIT 6.1200J Mathematics for Computer Science, Spring 2024
Instructor: Zachary Abel, Brynmor Chapman, Erik Demaine View the complete course: https://ocw.mit.edu/courses/6-1200j-mathematics-for-computer-science-spring-2024/ YouTube Playlist: https://www.youtube.com/playlist?list=PLUl4u3cNGP61VNvICqk2HXJTonnKgAc9d Elementary discrete mathematics for science
by MIT OpenCourseWare
31h 40m24 lessonsIntermediate645K views
Free
Ultrasound physics
This is a basic ultrasound physics course designed for radiologists and radiographers looking to study for ultrasound physics or radiology physics exams.
by Radiology Tutorials
6h 9m26 lessonsBeginner1.7M views
Free
Ultrasound physics course
This is a basic ultrasound physics course designed for radiologists and radiographers looking to study for ultrasound physics or radiology physics exams.
by Radiology Tutorials
6h 9m26 lessonsBeginner1.7M views
Free
Essence of linear algebra
A free course offering the core concept of linear algebra with a visuals-first approach.
by 3Blue1Brown
3h 1m16 lessonsBeginner67M views
Free
Physics
In 46 episodes, Dr. Shini Somara will help you find your place in the world -- literally! -- with physics. This course is based on introductory college-level material and the 2016 AP Physics I and II curriculum. By the end of this course, you will be able to: *Identify the fundamental forces descri
by CrashCourse
7h 29m47 lessonsBeginner71M views
Free
Fundamentals of Physics with Ramamurti Shankar
This course provides a thorough introduction to the principles and methods of physics for students who have good preparation in physics and mathematics. Emphasis is placed on problem solving and quantitative reasoning. This course covers Newtonian mechanics, special relativity, gravitation, thermody
by YaleCourses
28h 45m24 lessonsBeginner9.2M views
Free
Fundamentals of Physics II with Ramamurti Shankar
This is a continuation of the introductory course on the principles and methods of physics for students who have good preparation in physics and mathematics. This course covers electricity, magnetism, optics and quantum mechanics. For more information about Professor Shankar's book based on the lec
by YaleCourses
29h 49m25 lessonsBeginner7.8M views
Free
Essence of calculus
A free course offering the core concept of Calculus, with a visuals-first approach aimed at making you feel like you could have discovered the subject yourself.
by 3Blue1Brown
3h 11m12 lessonsBeginner47M views
Free
MIT 7.016 Introductory Biology, Fall 2018
Instructors: Barbara Imperiali, Adam Martin, Diviya Ray View the complete course: https://ocw.mit.edu/7-016F18 YouTube Playlist: https://www.youtube.com/playlist?list=PLUl4u3cNGP63LmSVIVzy584-ZbjbJ-Y63 7.016 Introductory Biology provides an introduction to fundamental principles of biochemistry, mo
by MIT OpenCourseWare
27h 52m35 lessonsBeginner3.6M views
Free
Differential Equations
After learning calculus and linear algebra, it's time for differential equations! This is one of the most important topics in mathematics, especially for those who are interested in physics and engineering, as these equations show up anywhere that rates of change are described. Learn about different
by Professor Dave Explains
4h 8m27 lessonsBeginner1.2M views
Free
Calculus 1 (Full Length Videos)
Topics: Review of Algebra/Trigonometric Concepts, Finding Limits, Derivatives and Derivative Techniques, Integrals and Integral Techniques, and Applications.
by Professor Leonard
44h 57m32 lessonsIntermediate25M views
Free
7th Grade, Unit 1, Illustrative Mathematics Tutorials Playlist
7th Grade, Unit 1, Open Up Resources - Illustrative Mathematics Tutorials Playlist. Search #711math #712math #713math to find individual tutorials fast!
by Illustrative Tutor
2h 46m13 lessonsBeginner464K views
Free
Inorganic/Organometallic Chemistry
So far we've learned a lot about general chemistry and organic chemistry, so let's move into inorganic chemistry and organometallic chemistry. In this series we will investigate all the elements on the periodic table that were ignored in organic chemistry, especially the transition metals. These ele
by Professor Dave Explains
5h 56m41 lessonsBeginner2.1M views
Free
Phys 326 Quantum Mechanics II
Course web page: Cemal Yalabık (Spring 2024) Department of Physics Bilkent University
by Bilkent Üniversitesi
25h 13m31 lessonsIntermediate21K views
Free
Calculus 2 (Full Length Videos)
Calculus of Logarithmic and Exponential Function, Techniques for Solving Integrals, Series, and Calculus with Polar Coordinates.
by Professor Leonard
50h 3m27 lessonsIntermediate17M views
Free
General Biology 1 - Lectures
Lectures that I have recorded for my General Biology 1 course.
by Biology with Jess
13h 17m15 lessonsIntermediate168K views
Free
Period Integrals of Algebraic Varieties and GKZ A-Hypergeometric Functions. S. Tanabe. Fall 2025
06.10.25
by Mathematics at HSE
17h 12m10 lessonsIntermediate1.4K views
Free
Geology Extra Curricular
Want to dive deeper into the topics covered in Crash Course Geology? Then this playlist is for you. Learn more about rocks, rivers, and renewable energy, plus what you need to know about climate change, natural disasters, and more.
by CrashCourse
10h 37m48 lessonsBeginner49M views
Free
Calculus 3 (Full Length Videos)
Calculus of Vectors, Vector Functions, Surfaces, and Vector Fields. Topics include an Introduction and study of vectors in 2-D and 3-D, a study of 3-D functions and surfaces, vector functions and calculus of vector functions, partial derivatives and multiple integrals using several coordinate syste
by Professor Leonard
75h 24m34 lessonsBeginner20M views
Free
Geology Crash Course
Welcome to Crash Course Geology! Over the course of 25 episodes, Sage will introduce you to the incredible geological forces, cycles, and processes that shape our world. This series will explore how geology touches all of our lives — and connects us to a much bigger story. Course Description In 25
by Dixon, D
3h 8m19 lessonsBeginner1.2M views
Free
Algebraic Bethe Ansatz. A.V.Zabrodin, V.V.Prokofev. Fall 2025
26.09.25
by Mathematics at HSE
13h 14m13 lessonsIntermediate994 views
Free
JAMB/WAEC 2027 Mathematics Online Tutorials (All Topics)/Syllabus
📚 JAMB/WAEC Mathematics Online Tutorials (All Topics/Syllabus) Welcome to O3Schools Mathematics Tutorials, your complete guide to mastering JAMB, WAEC, NECO, GCE, and Post-UTME Mathematics. This tutorial series covers the complete Mathematics syllabus and all major examination areas. The syllabus
by O3SCHOOLS
29h 32m81 lessonsAdvanced1.8M views
Free
IMAT 101 | Biology
All videos correspond to the IMAT Specifications
by Med School EU
19h 22m57 lessonsBeginner643K views
FreeThe author has removed some lessons
Prealgebra (Full Length Videos)
Topics: Introduction to the number line, Operations involving integers, Solving basic equations, Introduction to fractions, Introduction to rates and ratios, Operations with polynomials.
by Professor Leonard
38h 55m44 lessonsBeginner1.9M views
Free
Calculus 1 Playlist 2
Topics: Review of Algebra/Trigonometric Concepts, Finding Limits, Derivatives and Derivative Techniques, Integrals and Integral Techniques, and Applications.
by Professor Leonard
6h 1m27 lessonsIntermediate140K views
Free
Intermediate Algebra Playlist 2
Algebra skills including: Solving basic equations, Rational expressions and rational equations, Graphing, Inequalities and Absolute Value Equations, Radicals and radical equations, Working with Quadratic equations, Exponential and Logarithmic equations, and Conic Sections.
by Professor Leonard
4h 30m21 lessonsIntermediate97K views
Free
AP Physics C: Mechanics | Khan Academy
Check out AP Physics C: Mechanics on Khan Academy:
by Khan Academy
8h 9m36 lessonsIntermediate457K views
Free
Intermediate Algebra (Full Length Videos)
Algebra skills including: Factoring Basic Polynomials, Solving basic equations, Rational expressions and rational equations, Graphing, Inequalities and Absolute Value Equations, Radicals and radical equations, Working with Quadratic equations, Exponential and Logarithmic equations, and Conic Secti
by Professor Leonard
54h 33m46 lessonsIntermediate2.7M views
Free
Freshman Organic Chemistry with J. Michael McBride
This is the first semester in a two-semester introductory course focused on current theories of structure and mechanism in organic chemistry, their historical development, and their basis in experimental observation. The course is open to freshmen with excellent preparation in chemistry and physics,
by YaleCourses
30h 5m37 lessonsBeginner975K views
Free
Gr. 10 Chemistry
A day-by-day lesson of topics covered in SNC2D (Gr. 10 Academic Science). Worksheets and homework solutions are linked below. PowerPoints & CoursePack with Answer Keys: (log out of gapps account if it asks for permission) Patreon: (Do not click if you are a current student)
by Science'n'me
2h 53m14 lessonsBeginner184K views
Free
Cell Biology Full Course | 13 High-Yield Chapters
🎓 Welcome to the Complete Cell Biology Lecture Series by MedicoMedics! In this full-length, 2.5+ hour course, we break down cell biology into 13 crystal-clear chapters — perfect for medical students, premeds, nursing students, biology majors, and anyone preparing for USMLE, NCLEX, PLAB, or related
by MedicoMedics
2h 32mBeginner18K views
Free
Calculus 1 Playlist 1
Topics: Review of Algebra/Trigonometric Concepts, Finding Limits, Derivatives and Derivative Techniques, Integrals and Integral Techniques, and Applications.
by Professor Leonard
38h 57m177 lessonsAdvanced1.4M views
Free
Calculus - Limits Test Review
This calculus 1 playlist provides access to some free practice test questions on limits.
by The Organic Chemistry Tutor
18h 22m31 lessonsIntermediate582K views
Free
Algebra Introduction - Basic Overview - Online Crash Course Review Video Tutorial Lessons
This math video tutorial provides a basic overview of concepts covered in a typical high school algebra 1 & 2 course or a college algebra course. This video contains plenty of lessons, notes, examples, and practice problems for you to get a good foundation in algebra. Subscribe:
by The Organic Chemistry Tutor
1h 18mBeginner5.3M views
Free
AP Chemistry Review
Let me help you prepare for the AP Chemistry exam! These review materials are the absolute fastest way to review all the most important concepts. Check out the unit summary videos, then test your knowledge with tons of practice problems.
by Professor Dave Explains
13h 10m41 lessonsIntermediate675K views
Free
Physics With Calculus
This playlist contains videos with physics and calculus.
by The Organic Chemistry Tutor
17h 16m24 lessonsIntermediate12M views
Free
Physics
In this video, you'll learn the following topics ✅Heat conduction and Calorimetry ✅Molecular basis of expansion ✅Linear expansion in solids ✅Volume expansion ✅Expansion in liquids ✅Expansion in gases ✅Application: Bimetallic Strip
by Fidel Tutorial
6h 51m23 lessonsIntermediate2.2K views
Free
Linear Algebra (Full Course)
A one semester, introductory course in Linear Algebra. Emphasizes both conceptual understanding and procedural fluency in applying the techniques of Linear Algebra. Major topics are solving linear systems, linear transformations, linear independence, bases, dimension, eigenvalues and eigenvectors, d
by Dr. Trefor Bazett
10h 50m84 lessonsBeginner5.6M views
Free
Chemistry
In this video, we've covered the following topics: ✅Temperature and Collision Theory ✅Transition State Theory ✅Examples and Exercises
by Fidel Tutorial
13h 16m26 lessonsIntermediate1.3K views
Free
AP Physics 2
Review Material for the AP Physics 2 Exam in May. Additional Review can be found at:
by Science'n'me
1h 35m7 lessonsBeginner1.9K views
Free
Biology
The following topics are covered 1.4 Ethical issues in biology 1.4.1 Ethical treatment of plants and animals during biological studies Unit one summary
by Fidel Tutorial
5h 35m13 lessonsBeginner932 views
Free
Calculus II (Integration Methods, Series, Parametric/Polar, Vectors) **Full Course**
This is the playlist for a full Calculus II course taught by Dr. Trefor Bazett. It will cover: 1) Integration Methods (Integration by Parts, Trigonometric Integrals, Trig subs) 2) Improper Integrals 3) Arclength and Surface Area of revolution 4) Sequence and Series (Power Series, Taylor Series, Con
by Dr. Trefor Bazett
7h 45m52 lessonsIntermediate4.2M views
Free