Free Online Textbooks, Flashcards, Practice, Real World Examples, Simulations | CK-12 F... - 0 views
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Diane Berthoin-Hernandez on 22 Jul 14CK12 is both a teacher resource and a student hub. Standards-aligned for math and science in particular. Create your own "flex books" here too. This site has been adopted by Washington State and more information is pending for Oregon!