CK-12 FlexBook 2.0
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VisitCK-12 FlexBook 2.0 vs Opiq
What both publish
| Fact | CK-12 FlexBook 2.0 | Opiq |
|---|---|---|
| Audience | FlexBooks are designed for educators and students and cover K–12 topics. | The individual-user license is intended for people outside general education, such as university students or lifelong learners, and is for personal use only. |
| Headquarters | CK-12 lists its headquarters at 4300 Bohannon Drive, Suite 200, Menlo Park, California. | Tallinn, Estonia |
| Integrations | CK-12 lists Google Classroom, Canvas, Schoology, Kiddom, Clever and ClassLink as SSO or LMS partners. | Opiq can connect to eKool and Stuudium; teacher-assigned homework appears in those systems, and eKool teachers can import graded results. |
| 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. | The maker’s data-processing agreement lists access management, authentication services, data encryption, and security testing among its safeguards. |
CK-12 FlexBook 2.0 plans
- CK-12 FlexBook 2.0Free
- FlexBook 2.0Free
Opiq plans
- Päevikupakett€1 a month
- Algklassid ja eelkool (school license)€3.10 a month
- School package with e-lessons€4.60 a month
- Klassipakett€4.90 a month
- Erakasutaja 2026/27€15 a month
Pick CK-12 FlexBook 2.0 if…
FlexBook 2.0 suits K–12 educators who want to adapt textbook chapters and assign lessons or practice to classes and differentiated groups. Students can use its lessons and adaptive practice, while the browser access supports a range of device types.
Pick Opiq if…
Opiq suits students, teachers, and schools seeking digital curriculum materials and tools for assignments and progress tracking. Its individual plan is intended for personal learning outside general education, including university students and lifelong learners.