The ASTI has announced that it will continue its current industrial action as part of its dispute with the Department of Education over junior cycle reforms.
The announcement came after a ballot of members voted 55% to 45% against the proposals put forward by Minister Jan O’Sullivan.
The union said that it will re-issue an industrial action directive of non-cooperation with the junior cycle - including non attendance of training events - and a refusal to engage with any school-based assessment.
Just 38% of members voted in the ballot, but ASTI president Maire Ni Chiarba insisted that the union's members have spoken.
"We're a democratic organisation, and you know how it works in a democracy - people who don't vote disenfranchise themselves," she said.
"And in any election, to get a 38% turnout is not to be ignored, and 55% of those who voted have spoken and have given us a mandate, so we're proceeding on that basis."