GRAMMAR schools are educating a disproportionate number of post-primary pupils, figures reveal.
There are 130 non-grammar schools in the north and 66 grammar providers.
But while while grammar schools account for 33.7 per cent of all post-primaries - they educate more than 44 per cent of pupils.
It was originally envisaged that the sector would cater for around 25 per cent of young people.
About four in every 10 children transfer to grammars in first year, with the rest swapping schools at sixth form.
A smaller number of children, who either do not sit 11-plus style entrance exams or score high enough to win a first year place, will be admitted to grammar schools in second year.
Teachers have described this as being "particularly galling" for non-grammars. They say that while it is understandable that some parents would take the opportunity it robs non-grammars of academically higher achieving children.
The number of pupils in both sectors has remained largely unchanged since 2013/14.
Over the same period, the number of non-grammars has dropped from 140 to 130, and grammars from 68 to 66.
