The ASTI will hold a special convention to consider suspending all its industrial action, president Ed Byrne has confirmed.
The convention was demanded through a petition of members that to date has gathered more than 1,300 names, amid growing discontent about the union's dispute strategy.
The ASTI is the only union not to have accepted the Lansdowne Road Agreement (LRA) and is also refusing to co-operate with junior cycle reforms.
Apart from the disruption to schools caused by ASTI industrial action arising from the disputes, members are losing out on pay increases and new entrants to the profession have to wait longer for a permanent contract.
Under the rules of the Association of Secondary Teachers Ireland (ASTI), the convention must be held within six weeks.
No date has yet been announced, but it may emerge at a meeting of the union's 180-member executive committee tomorrow.