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4.5
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ck12.org

4.5
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(2 Reviews)
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2 Reviews by the community
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Nov 21, 2013
Nov 21, 2013
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This site, which offers free educational materials, many of which are used for MOOCs, is well organised and a boon for the self learner. You can download books or even make up your own text book, plus there is a growing wealth of other learning aides and links to similar sites.
Oct 26, 2011
Oct 26, 2011
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Great site, free knowledge supporting. came to this site through http://www.khanacademy.org/ One tracking cookie found by google analytics.

About this site

CK-12 Foundation provides a library of free online textbooks, videos, exercises, flashcards, and real world applications for over 5000 concepts from arithmetic to history

Trustworthiness
91
/100
Child Safety
92
/100