What Is a FlexBook® Textbook?

FlexBook® textbooks are CK-12's open source digital textbooks.

They are:

  • free and fully customizable
  • focused on science, technology, engineering, and mathematics (STEM)
  • aligned with state and Common Core standards

With FlexBook® textbooks, you can:

  • read, download, and customize
  • view online
  • read on an iPad or Android device
  • author from scratch
  • edit our books, build upon them, and share with students
  • add or remove images, videos, web links, and animations (either your own, or from the web)
  • share books through CK-12 Classes, Facebook, and Twitter

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