Qualification levels in Wales have improved, though not as much as in some other parts of the UK (Examination results in schools in Wales 2019/20, Welsh Government).
Mae lefelau cymwysterau yng Nghymru wedi gwella, ond nid cymaint ag mewn rhannau eraill o'r DU (Canlyniadau arholiadau mewn ysgolion yng Nghymru 2019/20, Llywodraeth Cymru).