CK-12 Foundation
Smarter Learning. For Free.
Overview
The CK-12 Foundation is a non-profit organization dedicated to increasing access to high-quality K-12 education. It provides a rich library of free online content, primarily in STEM subjects, including digital textbooks (FlexBooks®), concept-based learning modules, simulations, and adaptive practice. All resources are customizable and free for students and educators.
✨ Key Features
- Completely free
- Customizable digital textbooks (FlexBooks® 2.0)
- Interactive simulations and PLIX interactives
- Adaptive practice technology
- Strong focus on STEM subjects
🎯 Key Differentiators
- Customizable FlexBook® textbooks
- High-quality interactive simulations
- Strong focus on concept-based learning
Unique Value: Empowers educators and parents to create and customize high-quality, interactive STEM learning experiences for free.
🎯 Use Cases (4)
✅ Best For
- Free, customizable K-12 STEM resources
💡 Check With Vendor
Verify these considerations match your specific requirements:
- Families seeking a comprehensive, pre-packaged curriculum for humanities or language arts
- Users who need a structured, day-by-day lesson plan for all subjects
🏆 Alternatives
Unlike Khan Academy's video-focus, CK-12's core strength is its customizable digital textbooks and interactive simulations.
💻 Platforms
🔌 Integrations
🛟 Support Options
- ✓ Email Support
🔒 Compliance & Security
💰 Pricing
Free tier: All content and tools are free.
🔄 Similar Tools in Homeschool Software
Time4Learning
A comprehensive, self-paced online curriculum for homeschool, afterschool, and skill building....
IXL
A personalized learning platform with a comprehensive K-12 curriculum used for practice and assessme...
Acellus Academy
An accredited K-12 online school that uses video-based lessons and adaptive learning technology....
Power Homeschool
An online platform providing Acellus courses for parent-led homeschooling without direct teacher sup...
Khan Academy
A non-profit organization providing a free, world-class education for anyone, anywhere....
Easy Peasy All-in-One Homeschool
A free, comprehensive Christian homeschool curriculum for preschool through high school....