The ever-present argument that children from non-Welsh speaking backgrounds can’t reach their full potential in Welsh medium education has yet again come to the fore. Recent statistics obtained by the BBC under a Freedom of Information Act indicate that children who are taught through the medium of Welsh but don’t speak Welsh at home are less likely to overachieve by the time they reach the end of their primary schooling (i.e. obtaining a ‘Level 5’ or higher at key stage 2 (KS2) in the core subjects of English, Welsh First Language, Mathematics and Science)