This was a phased implementation with children who were in Nursery Years 1 or 2, Year 1, Year 3, Year 5, Year 7 and Year 10 being the first to be moved on to the ALN system.
Cyflwynwyd y system yn raddol, a'r plant ym Mlynyddoedd Meithrin 1 neu 2, Blwyddyn 1, Blwyddyn 3, Blwyddyn 5, Blwyddyn 7 a Blwyddyn 10 oedd y cyntaf i gael eu symud i'r system ADY.