Free Online Textbooks, Flashcards, Adaptive Practice, Real World Examples, Simulations
CK-12 Foundation provides a library of free online textbooks, videos, exercises, flashcards, and real world applications for over 5000 concepts from arithmetic to history
Total Visits
Avg. Visit Duration
Pages per Visit
Bounce Rate
Registration Date
| Month | Traffic |
|---|---|
| 2025-01 | 3K |
| 2025-02 | 3K |
| 2025-03 | 3K |
| 2025-04 | 3K |
| 2025-05 | 3K |
| Source | Traffic Share |
|---|---|
| search | 64.83% |
| direct | 29.73% |
| referrals | 4.66% |
| social | 0.48% |
| paid referrals | 0.25% |
| 0.05% |
| Keyword | Traffic | Volume | CPC |
|---|---|---|---|
| ck12 | 3,330 | 33,300 | $1.48 |
| flexi | 16,002 | 160,020 | $0.22 |
| ck-12 | 1,037 | 10,370 | $0.00 |
| flexi ai | 402 | 4,020 | $1.72 |
| polyatomic ions | 7,169 | 71,690 | $0.00 |