Courses
Science
9 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
MIT 18.642 Topics in…
by MIT OpenCourseWare
26h 12m · Intermediate
October 2025
Free22 lessons
Biology
by CrashCourse
10h 48m · Beginner
May 2023
Free51 lessons
MIT 18.200 Principles of…
by MIT OpenCourseWare
24h 42m · Intermediate
November 2025
Free20 lessons
All Science courses
Nothing here costs anything. No card, no trial, no account needed to watch.
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
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
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
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
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
Foundations of Chemistry 基礎化學
這個課題是化學的基礎知識，熟讀並打穩根基，有助學生在化學世界中探索。 Here comes the basic knowledge of chemistry. Being familiar with the content makes it easier for you to understand the challenging topics ahead.
by 萌芽教室 Sprouting Classroom
7h 22m34 lessonsBeginner75K views
Free
Yale Quantum Institute Course on Quantum Error Correction
This video is the live capture of the Yale Quantum Institute Course on Quantum Error Correction, held at the Yale University in July 2025, in partnership with NC A&T. This short course will provide viewers strong foundation on Quantum Error Detection & Quantum Error Correction. Viewers are encoura
by YaleCourses
11h 38m7 lessonsBeginner12K views
Free
有機化學(全) A Crash Course of Organic Chemistry
有機化學銜接課程 利用每個單元5-8分鐘的時間，幫您銜接高中端與大學端的有機化學課程，帶領各位領悟有機奧秘。 Ch0. Orbitals & Resonance & Functional Groups Ch1. Structures & Conformations Ch2. Stereochemistry : Enantiomers v.s. Diastereomers Ch3. Substitution Reactions (SN1 v.s. SN2) Ch4. Elimination Reactions (E1 v.s. E2) Ch5. Alkenes and Alkynes Ch6
by 威克漢化學 Wickhan Chemistry
9h 30m88 lessonsBeginner253K views
Free