With a library of over 3,500 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.Visit site: http://www.khanacademy.org/
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