O ran y perfformiad addysgol, daeth Estyn i’r casgliad nad oedd y perfformiad mewn ysgolion cynradd yn cymharu’n dda â pherfformiad ysgolion tebyg mewn awdurdodau eraill ledled Cymru. Er y bu gwelliannau mewn presenoldeb, mae gormod o ysgolion cynradd yn yr hanner is o gymharu ag ysgolion tebyg ar y meincnodau prydau ysgol am ddim. Nid yw trefniadau’r awdurdod ar gyfer cefnogi a herio ysgolion yn ddigon trylwyr, ac nid ydynt wedi cael digon o effaith ar wella deilliannau. Mae’r awdurdod hefyd yn ymateb yn rhy araf i’r lefel gynyddol o leoedd dros ben yn y sector uwchradd.
In terms of educational performance, Estyn found that performance in primary schools does not compare well with that of similar schools in other authorities across Wales. Although there have been improvements in attendance, too many primary schools are in the lower half in comparison with similar schools on the free-school-meals benchmarks. The authority’s arrangements for supporting and challenging schools are not robust enough and have not had enough impact on improving outcomes.  The authority is also responding too slowly to the increasing level of surplus places in the secondary sector.