One of Northern Ireland's teaching unions has said 98% of its members have voted in favour of industrial action.
The proposed action comes as part of a dispute over pay, working conditions and workload.
The NASUWT also said 81% of ballots returned advocated for strike action, due to the "deep anger" at the current state of affairs in the education sector.
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Dr Patrick Roach, NASUWT General Secretary, said the results of the ballot were an "emphatic and unequivocal message".
“This strength of feeling must now be recognised and the pay, workload and working conditions must be addressed by the Education Minister," he said.
“Teachers wish to avoid industrial action but they have been left with no choice by the derisory pay offer and the failure to tackle spiraling workloads.
"Our members are strong and united and they are saying they will no longer tolerate the damage being done to education and to their working lives.”
The union previously called a two-year pay offer made in February "measly" and "derisory".
"We will now enter a sustained period of industrial action across Northern Ireland’s schools," said the NASUWT's NI National Official Justin McCamphill.
"Details of the industrial action instructions will be sent to employers and members imminently.”
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Read more: Northern Ireland teachers to vote for industrial action amid 'concerns over pay and workload'
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