acko.net
Steven Wittens's blog with interactive WebGL explanations of maths and graphics.
about this site →// directory / learning-and-education
Learning & Education
Sites that teach you something real, from university courses to how a car engine works.
algebrarules.com
Every basic algebra rule you actually need, on one clean, memorable page.
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animatedknots.com
Every useful knot demonstrated as a step-by-step animation you can scrub through frame by frame.
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aldaily.com
Long-running curated feed of the best essays, criticism and ideas writing on the web.
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ciechanow.ski
Interactive, animated deep-dives explaining how watches, lenses and engines really work.
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betterexplained.com
Maths concepts explained with intuition and analogies first, formulas second.
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classcentral.com
Searchable index of tens of thousands of free online courses from universities and companies, including which ones award free certificates.
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everything2.com
Pre-Wikipedia collaborative writing community where entries are essays, not encyclopedia stubs.
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existentialcomics.com
Philosophy webcomic that is both genuinely funny and a real intro to the canon.
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flagmatch.com
Quick game for matching every country to its flag until you actually know them.
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play.freerice.com
A vocabulary and trivia quiz that donates rice through the UN World Food Programme for every correct answer.
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globalgreyebooks.com
Thousands of free, well-formatted public-domain ebooks in PDF, ePub and Kindle formats.
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morse.withgoogle.com
Teaches you Morse code in roughly 15 minutes using mnemonics and spaced practice.
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hacksplaining.com
Interactive walk-throughs of common web vulnerabilities — SQL injection, XSS, CSRF — from both attacker and defender sides.
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howacarworks.com
Illustrated guides and video courses explaining how every major car system and engine component operates.
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jetpunk.com
Enormous library of timed trivia quizzes that will actually teach you the world map.
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khanacademy.org
Free, structured courses and practice for maths, science, economics and test prep, from primary school to early university.
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learnxinyminutes.com
Whirlwind tours of 100+ programming languages as a single heavily-commented code file each.
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lifemap.cnrs.fr
Tree of life explorer with pan-and-zoom navigation that works like a map.
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literature-map.com
Type an author and see a constellation of writers whose readers also love them.
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makingsoftware.com
Illustrated, animated explanations of how software and hardware actually work.
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gavo.t.u-tokyo.ac.jp
University of Tokyo tool that shows Japanese pitch accent for words and full sentences.
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onezoom.org
An infinitely zoomable, fractal map of the evolutionary relationships between 2.2 million species.
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openlibrary.org
The Internet Archive's lending library: search millions of books and borrow many of them free in the browser.
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openstax.org
Peer-reviewed, genuinely free college textbooks across maths, science, social science and business.
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gutenberg.org
75,000+ public-domain ebooks, free to download in every common format with no account.
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py4e.com
Free full Python course from Dr. Charles Severance with video lectures, exercises, and an online textbook.
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readsomethinginteresting.com
One button that serves a random genuinely interesting blog post.
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scaleofuniverse.com
Zoom smoothly from quantum foam to the observable universe on one scroll bar.
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scratch.mit.edu
MIT's block-based programming playground where millions of kids build their first game.
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simplyscripts.com
Huge free archive of movie, TV and radio scripts for studying how they're written.
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mystery.knightlab.com
Learn SQL by querying a fictional police database to solve a murder.
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pepysdiary.com
The 1660s diary published one entry per day, with annotations from readers.
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ncase.me
Playable explainer on game theory that makes the prisoner's dilemma click.
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feynmanlectures.caltech.edu
Caltech's complete, free, beautifully typeset online edition of Feynman's undergraduate physics lectures.
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physicsoftheuniverse.com
A patient, jargon-light tour of cosmology, quantum theory and relativity.
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theredhandfiles.com
Nick Cave answers strangers' questions with startling honesty and no interviewer.
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whichbook.net
Find your next novel by setting sliders for mood, tone, setting and character.
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wolframalpha.com
Computational knowledge engine that answers math, science, and data questions with step-by-step results instead of links.
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worldwidetelescope.org
Explore a stitched digitised sky survey with thousands of archived astronomy images.
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youglish.com
Hear any word or phrase pronounced by real speakers in thousands of YouTube clips.
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