Khan Academy

Khan Academy

About this app

You can learn anything. For free.

Spend an afternoon brushing up on statistics. Discover how the Krebs cycle works. Get a head start on next semester's geometry. Prepare for upcoming exams. Or, if you're feeling particularly adventurous, learn how fire-stick farming changes the landscape of Australia.

Whether you're a student, teacher, homeschooler, principal, adult returning to the classroom after 20 years, or a friendly alien trying to get a leg up in earthly biology — Khan Academy's personalized learning library is available to you, for free.

- Learn anything, for free: Thousands of interactive exercises, videos, and articles at your fingertips. Study math, science, economics, finance, grammar, history, government, politics, and much, much more.

- Sharpen your skills: Practice exercises, quizzes, and tests with instant feedback and step-by-step hints. Follow along with what you're learning in school, or practice at your own pace.

- Keep learning when you're offline: Bookmark and download your favorite content to watch videos without an internet connection.

- Pick up where you left off: Tailored to your current learning level, our mastery system gives instant feedback and recommendations on exactly which skills and videos to try next. And, if you choose to create a free account, your learning syncs with http://khanacademy.org, so your progress is always up-to-date across all your devices.

Learn using expert-created videos, interactive exercises, and in-depth articles in math (arithmetic, pre-algebra, algebra, geometry, trigonometry, statistics, calculus, differential equations, linear algebra), science (biology, chemistry, physics), economics (microeconomics, macroeconomics, finance and capital markets), humanities (art history, civics, finance, US history, US government and politics, world history), and more (including computer science principles)!

Already familiar with the Khan Academy website? Not all functionality is available in this app. Community discussions, computer programming content, test prep, parent tools, teacher tools, and district tools should all be accessed directly at http://khanacademy.org.

Khan Academy is a 501(c)(3) nonprofit organization, with the mission of providing a free, world-class education for anyone, anywhere.

Ratings and reviews

love this. but there are several questions that come up with words or letters that overlap each other making guessing the answer the only option as the choices are unreadable. This showed up in the Early Math level. It's happened several times while I was watching the student work. Otherwise I love the program. Still trying to figure out how to add another teacher. That's a place that could be made more user friendly.

This app is so helpful and 100% free. Absolutely no ads and it only asks for the occasional donation but it's not a pop up window and it's once in a week or so. Excellent study tool with brilliant explanation and practice problems to apply skills. I highly recommend to anyone looking for a 5 on the AP exams, 100% on the next test or a 1650 on the SAT. Only caveat is there is not an ACT prep, but SAT prep is close enough for me at least, still, it's an awesome app and I 100% recommend to all.

Very good but not always easy to use, they recently added the text boxes to mobile which is great but they are hard to move and there isn't any space to use them (because the keyboard takes up a lot of the screen) so I would suggest a scroll at the side to give us more space for workings, as I don't always have paper

What’s new

∙ Bug fixes and performance improvements.