CK-12 FlexBook 2.0 vs Khan Academy
CK-12 FlexBook 2.0
ck12.orgKhan Academy
khanacademy.orgSide by side
| Figure | CK-12 FlexBook 2.0 | Khan Academy |
|---|---|---|
| Price from | Free | $0.83/mo |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| iOS | Yes | Yes |
| Android | Yes | Yes |
| Plans published | 2 | 6 |
| Spec score · K-12 Curriculum Platforms | 8.9 (#1) | 8.3 (#8) |
| Availability limit | CK-12 says it has converted many of its most-used books to FlexBook 2.0 and is still working to convert all core content. | Paid Khanmigo subscriptions require the subscriber to be at least 18, live in the United States, and have a U.S. billing address. |
| Headquarters | CK-12 lists its headquarters at 4300 Bohannon Drive, Suite 200, Menlo Park, California. | Mountain View, California, United States |
| Integrations | CK-12 lists Google Classroom, Canvas, Schoology, Kiddom, Clever and ClassLink as SSO or LMS partners. | Teachers can import Google Classroom student rosters, and district plans list Clever or ClassLink rostering and single sign-on. |
| Privacy and security | CK-12 says it uses administrative, technological, and physical safeguards and encrypts information transmissions using SSL or similar technologies. | The privacy policy says Khan Academy uses reasonable organizational and technical safeguards to protect personal information. |
| Support | Users can contact CK-12 Support by starting a support ticket or sending an email. | Khan Academy provides a Help Center and Community Support links for assistance. |
| Teacher tools | Teachers can assign lessons, interactives, videos, and adaptive practice to a class or differentiated groups and view student progress reports. | Khanmigo teacher tools can help with lesson planning, feedback, student work summaries, rubrics, and exit tickets. |
Plans
Khan Academy
- Enterprise Starter$10 a year
- Khan AcademyFree
- Khanmigo Teacher ToolsFree
- Khanmigo Learner Subscription$4 a month
- Khanmigo Parent Subscription$4 a month
- EnterprisePriced on request
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.
Khan Academy
Khan Academy is a free learning platform for independent learners, teachers and parents, available on Android, iOS and the web. It offers more than 840 free courses in core academic subjects for K–12 and early college, with personalized learning intended to help students master concepts and address learning gaps. The mobile app includes interactive exercises, mastery levels, synced progress, offline video downloads and a scratchpad. Khan Academy Kids is a free, ad-free app for children ages 2–8 with interactive books, games and creative lessons. Khanmigo tutoring guides learners toward answers across academic subjects from elementary school through college. Teacher tools can assist with lesson planning, feedback, student work summaries, rubrics and exit tickets; Khan Academy for Teachers also includes standards-aligned practice, progress tracking and AI support. Teachers can import Google Classroom rosters, while district plans list Clever or ClassLink rostering and single sign-on. Paid Khanmigo subscriptions require users to be at least 18, live in the United States and have a U.S. billing address. Parent and learner subscriptions each cost $4 a month.