Nod y system gategoreiddio yw pennu’r cymorth sydd ei angen ar ysgolion er mwyn iddynt wella. Mae’n cynnig ffordd gyfannol, holistaidd o wella ysgolion - gan ystyried cyd-destun yr ysgol ac ystod eang o wybodaeth wrth ddyfarnu ar hunanasesiad yr ysgol a’i chapasiti i wella.
The purpose of the categorisation system is to identify the support our schools need to improve. It offers a holistic approach to school improvement, which allows the context of the school and a broad range of information to be taken into account when determining a judgement on the school`s self-evaluation and capacity to improve.