English: National Purpose for Schools
Welsh: Diben Cenedlaethol Ysgolion 
Subject: Addysg
Welsh definition: http://www.sefwales.co.uk/cym/sef-p2-home/sef-p2-about-sef/sef-p2-about-sef-sef-and-schools/sef-p2-sef-national-purpose-for-schools.htm