100 schools angry over exam grades, says ASCL union
Teachers from 100 schools have expressed anger at results received by pupils from a new English GCSE in January, says a teacher's union.
It comes as head teachers in the Rhondda Cynon Taf council area want their children to re-sit the exam unit.
In an letter to Education Minister Huw Lewis, they raise concerns that results of the exam have eroded confidence in the examinations system.
But Mr Lewis accused the head teachers of "reckless scaremongering".
The Welsh exams board WJEC has launched an internal review into the results.
The unit was part of the first Wales-only GCSE examinations, ordered after a split between Northern Ireland, England and Wales in 2012.
The Association of School and College Leaders (ASCL) says it has received evidence from more than 100 schools that results were not in line with expectations in Rhondda Cynon Taf, Gwynedd and Anglesey and it was was expecting to hear more concerns from teachers in Cardiff.
ASCL secretary Robin Hughes explains more to Oliver Hides on BBC Radio Wales.