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.
The canonical free education site. K-12 math/science/humanities + university-level CS, economics, art history. Salman Khan's nonprofit. No signup needed for videos.
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.
Discover exceptional web design, then decode exactly how it is built — curated site breakdowns, colour palettes, templates and tools for anyone who wants to make better-looking pages. Free, no signup.
An interactive AI knowledge base — dozens of hands-on tools, explainers and learning paths that teach you how AI actually works and how to build with it, all running in your browser. No signup, nothing collected.
Math YouTube channel, 8-15 minute episodes. Brady Haran interviews mathematicians about specific problems. You don't need a math background to enjoy it.
Paste a link or drop a file and get back five sourced lines worth keeping. Works on articles, podcasts, videos, essays and newsletters.
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.
Free study guides for classic short stories and novels — themes, characters, symbols and endings explained, with flashcards and a quiz so it actually sticks.
A free research workspace for public companies: SEC filings, insider and congressional trades, earnings and valuation tools, all in one place instead of six tabs.