March 26th, 2012
Khan Academy allows you to learn almost anything for free.
Our iPad app is the best way to view Khan Academy's complete library of over 2,700 videos.
We cover a massive number of topics, including K-12 math, science topics such as biology, chemistry, and physics, and even the humanities with playlists on finance and history.
Spend an afternoon brushing up on statistics. Discover how the Krebs cycle works. Learn about the fundamentals of computer science. Prepare for that upcoming SAT. Or, if you're feeling particularly adventurous, learn how fire stick farming changed the landscape of Australia.