| School | Address | Town | County | |
|---|---|---|---|---|
| Ysgol Maesyllan | Maesyllan Lane | Wrexham | Select | |
| Ysgol Meifod | Meifod | Powys | Select | |
| Ysgol Melyd | Ffordd Pennant | Denbighshire | Select | |
| Ysgol Min-Y-Ddol | Lon Plas Kynmaston | Wrexham | Select | |
| Ysgol Morfa Nefyn | Morfa Nefyn | Gwynedd | Select | |
| Ysgol Morfa Rhiannedd | Ffordd Cwm | Conwy | Select | |
| Ysgol Morgan Llwyd | Ffordd Cefn | Wrecsam | Select | |
| Ysgol Mynach | Pontarfynach | Ceredigion | Select | |
| Ysgol Mynydd Bychan | New Zealand Road | Cardiff | Select | |
| Ysgol Mynydd Isa | Chambers Lane | Mold | Select |