| Textbook Structures and Mathematical Forms | The Americans’ Textbook Editions | |
| 2002 Edition | 2015 Edition | |
| Skillbuilder Interpreting Graphs | 31 | 31 |
| Representations | 49 | 48 |
| Questions | 48 | 47 |
| Geography Skillbuilder | 14 | 13 |
| Representations | 4 | 4 |
| Questions | 15 | 14 |
| Data File | 5 | 4 |
| Representations | 5 | 4 |
| Questions | 6 | 5 |
| Assessment Sections | 6 | 8 (33% ) |
| Representations | 8 | 10 (25% ) |
| Questions | 8 | 14 (75% ) |
| Other | 5 | 12 (140% ) |
| Representations | 9 | 20 (122% ) |
| Questions | 3 | 6 (100% ) |
| Total: | 61 | 68 (10.3% ) |
| Representations | 76 | 90 (18.2% ) |
| Questions | 79 | 81 |