CK-12 FlexBook 2.0 vs Science4Us
CK-12 FlexBook 2.0
ck12.orgScience4Us
science4us.explorelearning.comSide by side
| Figure | CK-12 FlexBook 2.0 | Science4Us |
|---|---|---|
| Price from | Free | — |
| Free plan | Yes | — |
| Free trial | — | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| iOS | Yes | — |
| Android | Yes | — |
| Plans published | 2 | 1 |
| Spec score · Science Learning Software | 8.9 (#2) | 6.9 (#22) |
| Device access | CK-12 says FlexBooks are usable on smartphones, Chromebooks, tablets, laptops and desktops. | The company says Science4Us works with internet-connected devices and supports classroom use with one computer and a projector. |
| Purpose | FlexBooks are customizable digital textbooks for K–12 subjects including science, math, and social studies. | Science4Us is an interactive science curriculum designed for students in grades K–2. |
| 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. | ExploreLearning states that it earned ISO 27001:2013 certification in 2024 and describes its applications as certified COPPA and FERPA compliant by iKeepSafe. |
| Support | Users can contact CK-12 Support by starting a support ticket or sending an email. | Science4Us offers a support form and lists phone support at 866-882-4141 and +1-434-293-7043. |
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.
Science4Us
Science4Us has no write-up on Specifiction yet; its figures are above.