CK-12
Features:
- CK-12 is probably the biggest open content provider for K-12 STEM content.
- CK-12 provides standards-aligned teaching resources. Content is mapped to a variety of levels and standards, including common core.
- The most incredible feature of CK-12 is its customizable textbook.You can customize a textbook (called “Flexbook”) for your students to use. You can start from scratch or build from anything in the FlexBooks library.
- Watch this video to learn more about the Flexbook feature of CK-12
License Setting
- All CK-12 courses are licensed under CC BY NC 3.0.
- This license lets you remix, tweak, and build upon the original work non-commercially, and although your new works must also acknowledge you and be non-commercial, you don’t have to license your derivative works on the same terms.
Sample Attribution
CK-12 made it clear about how they wish to be cited. It is a little bit unconventional and I think it is best for you to visit their Attribution Guidelines and learn their requirements.
![Share on Facebook Facebook](https://www.openwa.org/wp-content/plugins/social-media-feather/synved-social/image/social/regular/48x48/facebook.png)
![Share on Twitter twitter](https://www.openwa.org/wp-content/plugins/social-media-feather/synved-social/image/social/regular/48x48/twitter.png)
![Share on Linkedin linkedin](https://www.openwa.org/wp-content/plugins/social-media-feather/synved-social/image/social/regular/48x48/linkedin.png)
![Share by email mail](https://www.openwa.org/wp-content/plugins/social-media-feather/synved-social/image/social/regular/48x48/mail.png)