Teachers in Northern Ireland are to strike early next year in a long-running dispute over pay and conditions.
The main teaching unions, including headteachers, said their members would strike on 18 January.
It follows a full-day walkout in April and a half-day action on 29 November.
The industrial action taken by teaching unions has been mainly due to a pay dispute, with a stalemate over a deal running for more than a year.
In a statement issued on behalf of the Department of Education and Education Authority, they said they "recognise the frustration of teachers and school leaders over the ongoing absence of a pay offer".
"It is regrettable that, due to an inadequate education budget, it has not been possible for the teachers to be offered a pay award," the statement from Management Side of the Teachers' Negotiating Committee continued.
Management Side comprises representatives of all the education employing authorities, sectoral bodies and the department.
