| Views | |
| Educators' selection and evaluation of natural sciences textbooks | 70 |
| November 2012 | December 2012 | January 2013 | March 2013 | April 2013 | May 2013 | |
| Educators' selection and evaluation of natural sciences textbooks | 9 | 11 | 16 | 6 | 7 | 4 |
| Views | |
| United States of America | 27 |
| China | 15 |
| Canada | 11 |
| Russian Federation | 8 |
| Estonia | 3 |
| Japan | 2 |
| Germany | 1 |
| Iran | 1 |
| Taiwan | 1 |
| Ukraine | 1 |
| Views | |
| Beijing | 11 |
| Toronto | 11 |
| Redwood City | 9 |
| Sayreville | 7 |
| Seattle | 3 |
| Tartu | 3 |
| La Jolla | 1 |
| Taipei | 1 |