| Value | Category | 
|---|---|
| 0 | None | 
| 1 | Grade 0 | 
| 2 | Sub A/ Grade 1 | 
| 3 | Sub b/ Grade 2 | 
| 4 | Std 1/ Grade 3 | 
| 5 | Std 2/ Grade 4 | 
| 6 | Std 3/ Grade 5 | 
| 7 | Std 4/ Grade 6 | 
| 8 | Std 5/ Grade 7 | 
| 9 | Std 6/ Form I/ Grade 8 | 
| 10 | Std 7/ Form II/ Grade 9 | 
| 11 | Std 8/ Form III/ Grade 10 | 
| 12 | Std 9/ Form IV/ Grade 11 | 
| 13 | Std 10/ Form V/ Grade 12 |