21 Category · Learn Online
Free and freemium sites for actually learning something.
The directory · 15 entries
Grant Sanderson's mathematics channel. Visual explanations of linear algebra, calculus, neural networks. The animations alone made him the genre's most-imitated educator.
Hank and John Green's educational YouTube channel. 10-15 minute episodes on world history, biology, economics, philosophy, and most major academic subjects. Fast-paced; well-written.
Harvard's intro to computer science, taught by David J. Malan. Free on edX. Widely considered one of the best programming courses ever recorded.
Fully free coding bootcamp. 3,000+ hours of curriculum, project-based, leads to verifiable certifications at no cost.
Virtually every course MIT teaches, with full lecture notes, assignments, and exams. Free, no signup. 2,500+ courses since 2001.
Animated educational videos averaging 5 minutes each. Genuinely the best 5-minute lesson format on the internet. Each comes with a "dig deeper" section.
Web design inspiration you can take apart: curated sites, color palettes, CSS tools and shadcn themes, with free design breakdowns and no account.
Learn AI free in your browser: interactive tools, plain-English lessons and learning paths on prompts, agents, tokens and how AI works. No signup.
Math YouTube channel, 8-15 minute episodes. Brady Haran interviews mathematicians about specific problems. You don't need a math background to enjoy it.
Article summarizer for links and files: paste an article, YouTube video, podcast or PDF and get five lines worth keeping, each tied to its source.
Online dictionary with a thesaurus, word origins, translations and a wordle helper, free with no sign-up. Look a word up and get everything on one page.
Bite-sized 5-minute courses delivered daily by email. Pick a 10-day course on something (Greek mythology, sleep science) and one short lesson lands each morning.
Aggregator for free university lectures across most academic disciplines. Yale, Stanford, Princeton lecture archives in one place.
Short story analysis and study guides: themes, characters, symbols, quotes and endings, with flashcards and a quiz.
Stock research tools in one workspace: SEC filings, insider trades, Congress trades, DCF calculator, earnings and valuation for any public company.