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Learning & Education
Free peer-reviewed college textbooks from Rice University
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CK-12
Free online textbooks and adaptive practice for K-12
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About CK-12
CK-12 provides free digital textbooks, videos, and adaptive practice across STEM and other subjects, customizable by teachers to their curriculum, from a nonprofit foundation. Schools replace expensive textbooks with flexible, updatable digital content. In practice, learners use it in short, regular sessions rather than long courses, and buyers usually compare it on content quality, feedback, and whether progress is tracked clearly over time.
CK-12 key facts
- Category: Learning & Education
- Pricing: Free — listed in this directory as a free tool, with no paid plan required to use it.
- Focus areas: textbooks, k12, adaptive
- Official site: ck12.org
About the Learning & Education category
Online courses and learning platforms to build new skills. The Learning & Education category on Tools Hub currently lists 356 tools. Alongside CK-12, it includes OpenStax, MIT OpenCourseWare, Open Yale Courses, Stanford Engineering Everywhere.
More in Learning & Education
Comparing tools in the Learning & Education category? These related listings are worth a look: OpenStax — Free peer-reviewed college textbooks from Rice University; MIT OpenCourseWare — MIT course materials published free for everyone; Open Yale Courses — Free Yale lectures and course materials online.
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Learning & Education
MIT course materials published free for everyone
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Learning & Education
Free Yale lectures and course materials online
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Learning & Education
Stanford Engineering Everywhere free courses
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Learning & Education
AI platform built for teachers and schools
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Learning & Education
AI spaces and assistants for classrooms