Free Education

A computational engine. Type a math, physics, or data question and it works out a step-by-step answer instead of returning search results.

Free interactive science and math simulations from the University of Colorado Boulder. Physics, chemistry, biology and math, all in the browser.

Free, peer-reviewed college textbooks from a Rice University nonprofit, covering most intro-level subjects, as PDF or online.

Short, hands-on lessons in math, science and coding where you solve problems as you go. Free to start; the full course library needs a paid Premium plan.

Online courses, certificates, and degrees from universities and companies such as Stanford, Google, and DeepLearning.AI. Certificates and degrees are paid.

A hub of interactive explainers where you learn an idea by playing with it instead of reading about it.

A large map of physics ideas from Georgia State University. Each topic links to the ideas it builds on, so you can trace anything back to basics.

Type a topic you want to learn and it points you to resources for it. Free.

Interactive explainers and playgrounds on science, technology and math, built so you learn by moving things around.

Interactive games and explainers by Nicky Case on trust, voting, anxiety and how systems behave.

A curated index of free university courses, audiobooks, films, and language lessons published by legitimate institutions.

The free encyclopedia, written by volunteers, in more than 300 languages.

A free math encyclopedia with thousands of entries, from basic geometry to research topics, each with formulas and diagrams.