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Free Books (Learn More)

Below are free books written by the founder Enoch Yu. For more information on the book and details on contribution, please visit each page.

Enoch's Notebook: An Introduction to Linear Algebra
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LibreNotebook
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Free Handouts (Learn More)

Below are selected free handouts. Please visit here to view all handouts.

Shape Maze Solution

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Desargues' Theorem

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Trigonometric Identities

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Lucas's Theorem

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Free Classes (Learn More)

Below are the recordings of selected classes. Please visit here to learn more about live classes and past classes!

Problem of the Day: 100 Problems for 100 Days
Number of Classes: 83
Status: WIP
Last Updated: August 9, 2026

An introduction to math olympiads with 100 problems from various sources including International Mathematical Olympiad (IMO) and National Math Olympiad (NMO).

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2025 Introduction to AMC 8
Number of Classes: 9
Status: Completed
End Date: September 1, 2025

Four live classes for introducing competition style problems to elementary school students

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2025 Introduction to AMC 10/12
Number of Classes: 3
Status: Completed
End Date: July 29, 2025

Live classes for middle and high school students interested in AMC 10/12

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