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CK-12
Free K-12 textbooks, simulations, and adaptive practice for math and science
Toolora score88Free
Free
| Spec | CK-12 | OpenStax |
|---|---|---|
| Category | Education & Learning | Education & Learning |
| Pricing | Free | Free |
| Toolora score | 88/100 | 95/100 |
| Best for | k12, textbooks, math, science | textbooks, college, open, courses |
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