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CK-12 (FlexBooks)flexbooks.ck12.org · Low evidenceCK-12 Foundation provides free, customizable digital textbooks called FlexBooks on an interactive platform for Math, Science, and other subjects. The platform includes features such as adaptive practice, simulations, and PLIX to help students learn by reading and actively engaging with the content. They also offer educator resources, certification programs, webinars, and school support, with materials aligned to CCSS Math and NGSS science standards.
CK-12 FoundationCK-12 (FlexBooks)Parse Score