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Science
3 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
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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 lessonsBeginner78K views
Free
Foundations of Biology 生物科基礎
什麽是生物學？我究竟可以如何準備高中生物科？同學們不用擔心！這個部分將提供你一切所需。 What is Biology? How can I prepare for my biology lessons in F4-6? No worry, this section provides everything you need.
by 萌芽教室 Sprouting Classroom
7h 33m31 lessonsIntermediate59K 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 lessonsBeginner255K views
Free