Further information and statistics on achievement pupils in Wales at Key Stage 3 can be found on StatsWales and Academic achievement of pupils statistical releases.
Mae rhagor o wybodaeth ac ystadegau ar gyflawniad disgyblion yng Nghymru yng Nghyfnod Allweddol 3 ar gael ar StatsCymru a datganiadau ystadegol Cyflawniad academaidd disgyblion.