| America (Grade) | UK (Year) | Ages |
| Kindergarden | 1 | 5-6 |
| 1st | 2 | 6-7 |
| 2nd | 3 | 7-8 |
| 3rd | 4 | 8-9 |
| 4th | 5 | 9-10 |
| 5th | 6 | 10-11 |
| 6th | 7 | 11-12 |
| 7th | 8 | 12-13 |
| 8th | 9 | 13-14 |
| Freshman | 10 | 14-15 |
| Sophomore | 11 | 15-16 |
| Junior | 12 | 16-17 |
| Senior | 13 | 17-18 |
| America (Grade) | UK (Year) | Ages |
| Kindergarden | 1 | 5-6 |
| 1st | 2 | 6-7 |
| 2nd | 3 | 7-8 |
| 3rd | 4 | 8-9 |
| 4th | 5 | 9-10 |
| 5th | 6 | 10-11 |
| 6th | 7 | 11-12 |
| 7th | 8 | 12-13 |
| 8th | 9 | 13-14 |
| Freshman | 10 | 14-15 |
| Sophomore | 11 | 15-16 |
| Junior | 12 | 16-17 |
| Senior | 13 | 17-18 |