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Khan Academy

[http://www.khanacademy.org/] - 2012-05-31 12:47:10 - public:megatux

education, learning, science, videos, website - 5 | id:226623 -

Khan Academy

[http://www.khanacademy.org/] - 2010-02-26 14:34:26 - public:xxx

education, finance, free, kids, learn, lectures, math, mathematics, online, physics, reference, resources, science, teaching, tutorials, video, videos - 17 | id:794 -

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Khan Academy

[http://www.khanacademy.org/] - 2009-12-28 21:01:06 - public:time

education, learning, math, science, teaching, tutorial, tutorials, video, videos, youtube - 10 | id:3460 -

Powers of Ten

[http://www.powersof10.com/] - 2009-03-03 01:23:28 - public:megatux

education, science, Space, videos - 4 | id:227302 -

Science Videos Search Engine

[http://sciencehack.com/] - 2007-08-30 03:22:17 - public:time

archive, astronomy, biology, chemistry, collection, education, reference, science, video, videos - 10 | id:4349 -

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