Roedd sicrhau cydlyniant yn gasgliad allweddol yn asesiad polisi cyflym y Sefydliad ar gyfer Cydweithrediad a Datblygiad Economaidd (OECD), "The Welsh Education Reform Journey". Er iddo gydnabod ein cynnydd pwysig tuag at weledigaeth hirdymor ar gyfer addysg yng Nghymru, gwnaeth nifer o argymhellion i'n cefnogi ni ar ein taith tuag at welliant parhaus. Un o argymhellion yr adroddiad oedd y dylem ystyried gwneud hunanwerthusiadau ysgolion yn fwy amlwg yn y System Gategoreiddio Ysgolion, o bosibl drwy gael gwared ar y cyfrifiad ar gyfer data perfformiad ysgol (Cam 1) yn gyfan gwbl.
Ensuring coherence was a key finding in the Organisation for Economic Co-operation and Development’s (OECD) rapid policy assessment “The Welsh Education Reform Journey”. While recognising our important progress towards a long term vision for Welsh education, it made a number of recommendations aimed at supporting us on our journey of continuing improvement. One of the report’s recommendations was that we should consider making school self-evaluations more prominent in the School Categorisation System, possibly by removing the calculation for school performance data (Step 1) altogether.