A factorial matrix showing schools sampled for the study
| Senatorial district | Sample school | Class size | Group |
|---|---|---|---|
| Delta North | Obiaruku Grammar School | 32 | Experimental |
| Umutu Mixed Secondary School | 34 | Control | |
| West End Mixed Secondary School, Asaba | 32 | Experimental | |
| Delta Central | Abraka Grammar School | 32 | Control |
| Ogbe-udu Secondary school | 33 | Experimental | |
| Gana Mixed Secondary School, Sapele | 32 | Control | |
| Delta South | Essi College, Warri | 33 | Experimental |
| Dom-Domingos College, Warri | 32 | Control | |
| Total | Eight Schools | 260 |
| Senatorial district | Sample school | Class size | Group |
|---|---|---|---|
| Delta North | Obiaruku Grammar School | 32 | Experimental |
| Umutu Mixed Secondary School | 34 | Control | |
| West End Mixed Secondary School, Asaba | 32 | Experimental | |
| Delta Central | Abraka Grammar School | 32 | Control |
| Ogbe-udu Secondary school | 33 | Experimental | |
| Gana Mixed Secondary School, Sapele | 32 | Control | |
| Delta South | Essi College, Warri | 33 | Experimental |
| Dom-Domingos College, Warri | 32 | Control | |
Source(s): Fieldwork (2022)
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