CK-12 FlexBook 2.0 vs YUDU Publisher
CK-12 FlexBook 2.0
ck12.orgYUDU Publisher
yudu.comSide by side
| Figure | CK-12 FlexBook 2.0 | YUDU Publisher |
|---|---|---|
| Price from | Free | — |
| Free plan | Yes | — |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | — | Yes |
| macOS | — | Yes |
| iOS | Yes | Yes |
| Android | Yes | Yes |
| API | — | Yes |
| Plans published | 2 | 1 |
| Spec score · Digital Textbook Platforms | 8.9 (#2) | 7.2 (#24) |
| Accessibility | CK-12’s 2024 VPAT states that the FlexBooks 2.0 platform meets AA conformance across the criteria covered by the report. | Features include screen-reader compatibility, adjustable text size through Reflowable Mode, and keyboard navigation shortcuts. |
| Headquarters | CK-12 lists its headquarters at 4300 Bohannon Drive, Suite 200, Menlo Park, California. | Clitheroe, Lancashire, United Kingdom |
| Integrations | CK-12 lists Google Classroom, Canvas, Schoology, Kiddom, Clever and ClassLink as SSO or LMS partners. | The textbook features page lists live chat platforms including Microsoft Teams, Slack, Zendesk, HubSpot, and Salesforce, as well as Hotjar and Smartlook for behavioural analytics. |
| Purpose | FlexBooks are customizable digital textbooks for K–12 subjects including science, math, and social studies. | YUDU Publisher lets publishers turn print-ready PDFs into digital textbooks and eBooks, enhance them, and deliver access to readers. |
| Security | CK-12 says it uses administrative, technological and physical safeguards and encrypts transmissions with SSL or similar technology, while disclaiming a guarantee of security. | YUDU says it transitioned to ISO 27001:2022, the latest version of the information security management standard, in 2026. |
| Support | Users can contact CK-12 Support by starting a support ticket or sending an email. | YUDU lists a Publisher Help Desk and provides a support email address, [email protected]. |
Plans
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.
YUDU Publisher
YUDU Publisher has no write-up on Specifiction yet; its figures are above.