The Education minister has faced calls to take control of the unregulated school transfer system which has left some children facing the prospect of sitting five entrance exams this autumn.
Caitriona Ruane was urged by rival MLAs to accept the fact that thousands of parents want their sons and daughters to take an academic test to achieve a grammar school place.
She was asked to establish a statutory framework for such exams to take place.
In the absence of political agreement on the controversial issue, Ms Ruane has issued guidance to schools that non-academic selection criteria should take the place of the now defunct 11 Plus.
But this proposal has been rejected by almost 70 schools.
Those institutions have opted to ignore the minister's guidance and instead are setting their own entrance papers this year.
While the minister has warned that those tests do not have government backing and could be open to legal challenges, the breakaway schools have received more than 13,000 applications to sit the exams.
'Choice'
On Monday, the Ulster Unionists tabled an Assembly motion demanding that the minister take responsibility for the system and finally concede that academic criteria must play a role in post primary transfer.
"Our fundamental position is that parental choice is the bedrock of all democracy," said UUP Education spokesman Basil McCrea.
"We do not like the inequity of having our children do five separate tests, for those that wanted to get rid of the 11 Plus they seem to have ended up with two - that can't be the way forward."
"For those that want to keep it, they need a regulated system. This motion helps do that and I urge all members present to support the motion of the UUP."
The Alliance Party recommended that the minister set up a regulated test for 12 months starting next year - to enable more time to find a political solution to the transfer impasse.
But the minister refused to change her stance, telling the Assembly that the proposals represented a return to a system of inequality.
"Let me be absolutely clear and unambiguous, the 11 Plus is gone, the 11 Plus is not coming back in any shape or form," she said.
© Press Association