Khan Academy KhanAcademy

Khan Academy is now on Android!
– You can learn anything — for free: Over 10,000 videos and
explanations at your fingertips in math, science, economics,
history, and much, much more
– Quickly find what you need: Redesigned navigation and search make
it faster to find what you want
– Keep learning even when you’re offline: Bookmark your favorite
content to “Your List” (phone only) for easy access, and download
it to keep learning even when you’re not connected to the
internet.
– Pick up where you left off: Your learning syncs between your
Android and khanacademy.org, so your progress is always
up-to-date
Learn using videos and in-depth articles in math (arithmetic,
pre-algebra, algebra, geometry, trigonometry, statistics, calculus,
linear algebra), science (biology, chemistry, physics), economics,
and even the humanities with tutorials on art history, civics,
finance, and more.
Spend an afternoon brushing up on statistics. Discover how the
Krebs cycle works. Learn about the fundamentals of music notation.
Prepare for the upcoming SAT, GMAT, or MCAT. Or, if you’re feeling
particularly adventurous, learn how fire stick farming changed the
landscape of Australia.
It doesn’t matter if you are a student, teacher, home-schooler,
principal, adult returning to the classroom after 20 years, or a
friendly alien just trying to get a leg up in earthly biology—Khan
Academy’s materials and resources are available to you completely
free of charge.
Head over to www.khanacademy.org to learn more.