Qualifications Wales is the new body which is developing a new qualifications system in Wales - its website explains the changes and how they will affect exams including GCSE and AS and A levels.
Cymwysterau Cymru yw'r corff sy'n datblygu system gymwysterau newydd - mae ei wefan yn egluro sut bydd y newidiadau yn effeithio ar arholiadau TGAU, Safon Uwch ac eraill.