Most children in England go to primary school from the age of 5 to 11. These schools are largely co-educational, that is, boys and girls attend together. All schools follow the National Curriculum. The core, or main subjects, are English, mathematics, and science. Other subjects include history, geography, physical education, music, and art. In Wales, the Welsh language is a subject in Welsh-speaking schools. In the same way, in Northern Ireland, the curriculum includes the Irish language in Irish-speaking schools.