Published Friday, 18 November 2011
More than two million workers across the UK are expected to walk out, in protest over government reforms that unions say will leave them paying more, working longer and receiving less when they retire.
NASUWT is the latest union to declare the result of a ballot on industrial action, with around 40% turnout and a majority of about 80% voting in favour of the strike.
"Our schools are on the brink of a crisis affecting recruitment and retention - only the recession is preventing a mass exodus," General Secretary Chris Keates said.
"The members of the NASUWT have today confirmed that we cannot go on like this."
Members of the NASUWT did not rush to take industrial action - however, their patience has been severely tested. The NI Assembly needs now to take seriously the concerns voiced by teachers.
NASUWT
Those taking part in the vote - the union's first national ballot in over a decade - also backed plans to work to rule from 1 December.
"NASUWT members will be taking further action to reclaim the classroom from the shackles of unnecessary paperwork, bureaucracy and debilitating accountability," Chris Keates added.
"They will be standing up for standards and demonstrating once and for all the importance of teaching."
Members of the National Association of Head Teachers, the Irish Congress of Trade Unions, and the Irish National Teaching Organisation have already voted in favour of the 30 November walk-out.
The union Unite - whose members in Northern Ireland include Translink workers - has also backed the day of strike action, making disruption to services likely.
Michael Doran, a Unite representative for Belfast bus drivers, told UTV: "I want to take this opportunity to apologise to anyone who will be inconvenienced by the buses not operating, but we have a right to fight for what we believe is true and rightfully ours - and that is our pension."
Across the UK, schools, courts, government offices, job centres, driving tests, council services and hospitals are all expected to see some level of disruption.
Cabinet Office Minister Francis Maude said on Thursday: "We have listened to the concerns of public sector workers about their pensions and responded with a new generous settlement which is beyond the dreams of most private employees.
"I urge the trade unions to devote their energy to reaching agreement and not to unnecessary and damaging strike action, which is often on the basis of low turnout."