Everyone
Flexi
Getting Started
FlexBook® Textbooks
Practices & Quizzes
Mobile Practice App
Content
CK-12 Implementation Models
Simulations & PLIX
Copyright, Licensing & Attribution
- Why did CK-12 update the Terms of Use and change to a CK-12 Curriculum Materials License?
- Who Owns the FlexBook® Textbook I Create? What Are My Rights as a Creator?
- How to Attribute FlexBook® Textbook Content Under the CK-12 Curriculum License
- Can I Add Copyrighted Material in My FlexBook® Textbook?
- Who Is the Author of My FlexBook® Textbook?
- How to Obtain Permission to Use CK-12's Images
General FAQ
- Is CK-12 Free to Use?
- Can CK-12 Provide Transcripts?
- Why Is My School Account Linked to the Wrong Email for CK-12?
- I Received an Email for an Account I Didn't Create
- How Do I Change My Email Address in CK-12?
- How to Reactivate My Account?
CK-12 Resource Bookmarklet
Troubleshooting & System Requirements
- Why Can't I Open a FlexBook®?
- How to Enable Your Microphone when Using Flexi
- Troubleshooting Checklist
- Is My Browser/Device Supported?
- My page is slow to load or stuck on loading
- How to enable cookies