Schools were selected to cover a broad range of factors, including geographic location, language, size, and the number of learners eligible for free school meals (eFSM).
Dewiswyd ysgolion ar sail amrywiaeth helaeth o ffactorau, gan gynnwys lleoliad daearyddol, iaith, maint, a’r nifer o ddisgyblion sy’n gymwys am brydau ysgol am ddim (eFSM).