Is ck12.org safe? Reviews & Ratings

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

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ck12.org reviews 2
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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.
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.

Safety Rating Breakdown

Categories
Good site

Trustworthiness

91 / 100

Child Safety

92 / 100