| Levels | Equivalent Grade Range |
| A | Kindergarten |
| B,C | Kindergarten / Grade One |
| D,E,F,G | Grade One |
| H,I | Grade One / Two |
| J,K | Grade Two |
| L,M | Grade Two / Three |
| N,O | Grade Three |
| P | Grade Three / Four |
| Q,R | Grade Four |
| S,T | Grade Four / Five |
| U | Grade Five |
| V,W | Grade Five / Six |
| X,Y,Z | Grade Six |