The majority of teachers in Northern Ireland have rejected a 5.5% pay offer for 2024/25 and are set to take action short of strike.
BBC News NI understands that some of the terms of the offer on workload and strike action had proved to be contentious.
Teaching unions had received the 5.5% offer from the employers, including the Department of Education (DE), on Friday.
It was expected to have cost the Northern Ireland Executive around £49m.
But members of a number of teaching unions have declined to ratify the offer.
BBC News NI understands that members of the National Association of Head Teachers (NAHT) were the exception.
The NAHT’s position, which has just been communicated with members, has been to accept the pay offer.
