CK-12 FlexBook 2.0 vs LibreTexts
CK-12 FlexBook 2.0
ck12.orgLibreTexts
libretexts.orgSide by side
| Figure | CK-12 FlexBook 2.0 | LibreTexts |
|---|---|---|
| Price from | Free | $104.17/mo |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| iOS | Yes | Yes |
| Android | Yes | Yes |
| Plans published | 2 | 7 |
| Spec score · Digital Textbook Platforms | 8.9 (#2) | 8.3 (#6) |
| Spec score · Open Educational Resource Platforms | 8.9 (#3) | 8.4 (#6) |
| Accessibility | CK-12’s 2024 VPAT states that the FlexBooks 2.0 platform meets AA conformance across the criteria covered by the report. | LibreTexts states a goal for its platform and features to meet or exceed Revised Section 508 Standards and WCAG 2.1 AA, and says it audits accessibility at major development milestones. |
| Audience | FlexBooks are designed for educators and students and cover K–12 topics. | LibreNet membership is open to institutions in K-12 and higher education, while individual educators can use LibreTexts to create, adapt, and host OER free of charge. |
| Headquarters | CK-12 lists its headquarters at 4300 Bohannon Drive, Suite 200, Menlo Park, California. | Davis, California, United States |
| Purpose | FlexBooks are customizable digital textbooks for K–12 subjects including science, math, and social studies. | LibreTexts is a nonprofit open education resource platform for creating, customizing, and sharing accessible, interactive textbooks, adaptive homework, and ancillary materials. |
| Support | Users can contact CK-12 Support by starting a support ticket or sending an email. | LibreTexts offers free support tickets, monthly webinars, weekly office hours, and free Academy lessons. |
Plans
LibreTexts
- ADAPTFree
- All-AccessFree
- Jupyter HubFree
- LibreTexts core platformFree
- The ForgeFree
- LibreNet Consortium (affiliate)$1,250 a year
- LibreNet Consortium (full)$2,500 a year
In their own words
CK-12 FlexBook 2.0
CK-12 FlexBook 2.0 provides customizable digital textbooks for K–12 subjects including science, math, and social studies. Lessons can combine text with PLIX interactives, simulations, adaptive practice, and related learning materials. Adaptive Practice draws questions from a library of more than 150,000 and adjusts selections based on student answers. Teachers can assign lessons, videos, interactives, and practice to whole classes or differentiated groups, then view progress reports. Educators can reorder chapters and edit or add content in customized FlexBooks. The service works in browsers on laptops, desktops, Chromebooks, tablets, and mobile devices, and is listed at free. Standalone Simulations and PLIX Interactives require a tablet-size screen or larger. Users may download PDFs of FlexBooks they create or customize, though interactive content may not render; CK-12-created PDFs are not downloadable. CK-12 says it is still converting all core content to FlexBook 2.0. Listed SSO or LMS partners include Google Classroom, Canvas, Schoology, Kiddom, Clever, and ClassLink.
LibreTexts
LibreTexts is a nonprofit open education platform for creating, adapting, and sharing accessible textbooks, homework, and related learning materials. Its libraries cover 17 subject fields and more than 2,000 textbooks, and instructors can remix chapters into custom books. Pages can include Jupyter Notebooks, ADAPT homework questions, 3D visualizations, and videos. ADAPT supports formative and summative assessment and includes a shared bank of more than 240,000 openly licensed elements. LibreTexts can be embedded in institutional learning management systems over a secure connection, with optional grade and assessment exchange. Guides cover importing books into Canvas, Moodle, and D2L, and also mention Blackboard. Book pages may provide PDF, EPUB, and editable downloads. Educators can create, adapt, and host open educational resources free of charge. The service is available on the web, Android, and iOS, with offline access and annotation tools. A free plan is listed, with paid pricing from $15/mo.