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Free Books
Learn moreBelow are free books written by the founder Enoch Yu. For more information on the book and details on contribution, please visit each page.
LibreNotebook
A giant collection of personal notes for numerous topics including, but not limited to math olympiad, machine learning, introduction to higher level math, and competitive programming
Learn moreEnoch's Notebook: An Introduction to Linear Algebra
A free 173 pages beginner's guide to linear algebra that contains essential topics and practice problems
Learn moreFree Classes
Learn moreHere are the recordings of selected classes. Please visit here to learn more about live classes and past classes!
NL01CHEM01: Introduction to Chemistry for Middle School Students
An introduction to chemistry for curious middle school students
Learn moreProblem of the Day: 100 Problems for 100 Days
An introduction to math olympiads with 100 problems from various sources including International Mathematical Olympiad (IMO) and National Math Olympiad (NMO).
Learn more2025 Introduction to AMC 8
Four live classes for introducing competition style problems to elementary school students
Learn more2025 Introduction to AMC 10/12
Live classes for middle and high school students interested in AMC 10/12
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