In 2019, at age 4, around 6 in 10 children were at or above the expected developmental level for their age in maths and language, literacy and communication in English.
Yn 2019, roedd tua chwech o bob deg o blant 4 oed ar lefel ddatblygu ddisgwyliedig neu uwch ar gyfer eu hoedran mewn mathemateg ac iaith, llythrennedd a chyfathrebu yn Saesneg.