Where approaches are being trialled, this should involve a representative range of schools, prioritising those with greatest need and reaching as many schools as possible.
Lle caiff dulliau eu treialu, dylai hyn gynnwys ystod gynrychioliadol o ysgolion, gan flaenoriaethu’r rhai sydd â’r angen mwyaf a chyrraedd cymaint o ysgolion â phosibl.