SECOND-level teachers have voted overwhelmingly for industrial action in protest at Minister for Education Ruairi Quinn's plans to abolish the Junior Certificate exam.
In separate ballots, members of the ASTI and TUI voted by 88pc in favour of action.
The two organisations represent an estimated 27,000 second-level teachers.
The action is due to start on April 7 and will take the form of non-cooperation with the introduction and implementation of the minister's new framework for the junior cycle.
ASTI General Secretary Pat King, commenting on the ballot outcome, said: "Teachers have always been willing to modernise the Junior Certificate and Junior Cycle education.
"However they are not prepared to implement educationally unsound proposals which are being unilaterally imposed on them."
He said his members were demanding "genuine consultation on their concerns".
"The minister has an opportunity to make sure this happens before industrial action begins," Mr King added.
TUI General Secretary John MacGabhann said his members' vote for industrial action "reflects a deep concern that the Minister's proposals will impact negatively on the educational experience of young people and on the quality of the education system".
Under the reforms, teachers will grade their own students over the course of the Junior Cycle in place of State exams each summer.