The school inspectorate for Wales is calling for more to be done to improve children's Welsh reading and writing.
Estyn says that whilst children are making progress in speaking the language, their reading and writing isn't as developed.
So why are schools not doing better on one of their compulsory subjects? Our Education Corespondent Joanna Simpson investigates.
More top news
Welsh Secretary Stephen Crabb has launched an attack on Labour leader Ed Miliband, saying he "doesn't give a toss about Wales".
Mainly dry with lengthy clear spells overnight and just a few showers likely, especially in the north and west.
Ysgol Uwchradd Caergybi became the UK's first comprehensive 65 years ago. Academies are now dominant in England, but certainly not in Wales.