The NASUWT Teachers' Union have voted overwhelmingly for industrial action following a six-month-long pay dispute.
It is the third teachers union to vote for industrial action following ASCL and the NAHT.
On the Isle of Man, 94% of NASUWT members who took part in the ballot voted in favour of strike action and 98% voted in favour of industrial action short of strike action.
The turnout was 68%.
The Union represents around 60% of teachers and school leaders members on the Isle of Man.