IN an "unprecedented result" more than 93 per cent of principals and vice principals have voted in favour of industrial action over special educational needs and budget cuts.
Geri Cameron, president of NAHT trade union, said it showed "a clear mandate from members to proceed to the next step of the process".
"School leaders are a very reasonable group of people, but we are stretched to the limit," she said.
"We haven't escalated our dispute over pay. Our issues are special educational needs, workload and ever increasing pressure on our members driven by budget cuts as schools in Northern Ireland have seen the biggest real-terms reduction in per pupil funding compared to any other part of the UK since 2010.
"There is a generation of children in school now who deserve better."
NAHT is the only teacher union in Northern Ireland not taking any form of industrial action.
