Khan Academy, a site that hosts thousands of lectures in the form of videos and practice problems, has raised $5 million.
Khan Academy uses a mix of videos and problem sets to teach courses ranging from physics to computer programming and history.
Founder Salman Khan started the site to build an education system where students work at their own pace. Students are encouraged to continue working on the same topic until they master it and move on.
Khan used the funds to add two new faculty members that will create lectures for humanities and art-intensive classes.
Khan Academy gets around 39 million pageviews and 3.5 million unique users each month, Khan said at the Web 2.0 Summit in San Francisco last month.
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