Pupils in schools who have a home postcode in 20% most deprived areas of the Welsh Index for Multiple Deprivation 2019, at April 2021
Disgyblion mewn ysgolion sydd â chod post cartref mewn 20% o'r ardaloedd mwyaf difreintiedig ym Mynegai Amddifadedd Lluosog Cymru 2019, ym mis Ebrill 2021