| Group | School | Male | Female | Total |
| Experimental | EA | 25 | 18 | 43 |
|
| EB | 19 | 23 | 42 |
| Control | CA | 26 | 22 | 48 |
|
| CB | 28 | 21 | 49 |
| Total | 98 | 84 | 182 | |