The figures from regulator Ofqual
, which cover GCSEs, AS-levels and A-levels in England last summer, also show 2,715 penalties for students, up from 2,180.
's Glenys Stacey was called before Parliament's Education Select Committee on Wednesday and was taken to task over failures by exam boards.
SNE director Mike Parker, whose organisation represents the 1,250 schools in the region, called on Ofqual
to take immediate action as the situation "had a profound impact at a human level" and the chaos has led to widespread distrust among teachers, he said.
Glenys Stacey, chief executive of Coventry-based Ofqual
, said the only apology the regulator did consider was for commenting on the increasing divergence between Welsh and English GCSE results at a parliamentary committee hearing.
But examinations regulator Ofqual
has written to every secondary school and college in the country warning of "more variability" in results in 2014 compared with previous years following an overhaul of mainstream qualifications.
Sofia Azam was dismissed by exam regulator Ofqual
over claims she passed unauthorised information to Public and Commercial Services (PCS) union following a re-grading exercise.
A BIRMINGHAM union of-ficial sacked for gross misconduct by national school exam board regulator Ofqual
is to challenge the decision at an employment tribunal.
TEACHERS have lost confidence in GCSEs amid major concerns about marking, grading and standards, a report by the exams regulator Ofqual
Summary: Teenagers have been let down by an exams system that is abused by teachers who are under pressure to achieve good grades, Ofqual
Ms Burns said: "These revelations show the minister had ample opportunity to seek answers as to what discussions Welsh Government officials were having with Ofqual
about GCSE grades.
The MPs heard evidence from headteachers, union leaders and the head of exams watchdog Ofqual
Glenys Stacey yesterday.