Mae'n bosibl y caiff ysgolion ddiwrnod HMS ychwanegol bob blwyddyn dros y tair blynedd nesaf o dan gynlluniau a gyhoeddwyd heddiw gan y Gweinidog Addysg, Kirsty Williams.
Schools could be given an additional INSET day each year for the next three years under plans announced today by Education Minister, Kirsty Williams.