Mae'r cynnwys hwn ar gael yn Saesneg yn unig.
Professor Sally Power, Director of WISERD Education, warned against using the new Welsh Government school colour categorisations as a results league table.
Prof Power told the Western Mail that “categorisation is more useful for schools and local authorities, and is not a very useful indication for parents to select a school.”
As well as appearing in the Western Mail (full article below), Prof Power was interviewed for the ITV Wales News on 1st February.