Open-access textbooks, visual explanations, and interactive tools for mathematics, physics, chemistry, and biology. From high school level to graduate research — learn at your own pace for free.
An introduction to mathematical proof writing for undergraduates. Covers logic, sets, functions, relations, cardinality, and proof techniques. CC BY-ND licensed, free PDF from the author.
A popular undergraduate linear algebra textbook that takes a determinant-free approach. Emphasizes vector spaces and linear maps. Free to read online from Springer Open Access.
Richard Feynman's legendary physics lectures from Caltech, freely available online. Three volumes covering mechanics, electromagnetism, and quantum mechanics. Perhaps the best physics teaching ever recorded.
Comprehensive introductory biology textbook from OpenStax. Covers cell biology, genetics, evolution, ecology, and human physiology. Peer-reviewed, CC BY licensed. Free PDF download.
A textbook by Deisenroth, Faisal, and Ong covering the math behind ML: linear algebra, calculus, probability, optimization, and their applications to regression, PCA, and density estimation. Free PDF.
Visual, intuitive explanations of linear algebra concepts by Grant Sanderson. Covers vectors, matrices, determinants, eigenvalues, and abstract vector spaces through beautiful animations.
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