CK12.ORG - FlexBooks - Free customisable textbooks - 1 views
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Mark Woolley on 30 Aug 10Traditional textbooks are both expensive and rigid. FlexBooks conform to national and state textbook standards. They are free, easy to update and easy to customize. With FlexBooks, you can customize your textbooks to support your innovative work in the classroom. The CK-12 Foundation provides FlexBooks free to anyone who wants to use them.