Parcyrhun School is a Category A/B school.  Pupils in the Welsh stream at Key Stage 1 are taught solely through the medium of Welsh. Pupils in the Welsh stream at Key Stage 2 are taught Welsh as a 1st language and both the core and foundation subjects through the medium of Welsh.  Pupils in the English stream at both key stages are taught Welsh as a second language. Emphasis is placed on developing the bilingual skills of all pupils within all areas of school life.