Khan Academy - A free world-class education for anyone anywhere.
04:55AM Thu 17 Jan, 2013
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With a library of over 3,800 videos on everything from arithmetic to physics, finance, and history and hundreds of skills to practice, we're on a mission to help you learn what you want, when you want, at your own pace. We are a donor-supported not-for-profit and would not be possible without the generous support of users everywhere. In particular, we'd like to thank The Bill and Melinda Gates Foundation, Ann & John Doerr, the O'Sullivan Foundation, Reed Hastings, Google, and the Windsong Trust for their strong support of our mission.
About Khan Academy
The Khan Academy is an organization on a mission. We're a not-for-profit with the goal of changing education for the better by providing a free world-class education for anyone anywhere.
All of the site's resources are available to anyone. 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. The Khan Academy's materials and resources are available to you completely free of charge.
To know more about Khan Academy visit http://www.khanacademy.org/about