Data for primary and special schools in Powys, Ceredigion and Carmarthenshire is not included in this release due to technical issues extracting data from their management information systems.
Mae'r data ar gyfer disgyblion mewn ysgolion cynradd, canol, uwchradd ac arbennig yn unig ac nid yw'n cynnwys data ar gyfer ysgolion meithrin nac unedau cyfeirio disgyblion.