Teachers are set to down tools and take to the streets of London on 28 March in protest against the government's pension offer.
The announcement came after talks with the cabinet ended without resolution last week. Members of the University and College Union (UCU) and the National Union of Teachers (NUT) have voted to strike once again over the ongoing issue.
Christine Blower, general secretary of the NUT, said the government is "well aware" teachers do not accept the pesnion changes it is proposing.
"The vast majority of teaching unions have not signed up to the latest pension proposals which still mean that teachers will have to pay much more, work much longer and get much less in retirement," she said on Friday.
“The NUT believes it is essential that the teaching profession stands united on this issue."
On 30 November last year, London was filled with teaching staff and trade union members protesting against the proposed pension changes. Blower added her members could not be expected to "just accept" the proposals "without a justifiable reason".
The NUT head added the union would be writing to others to look at the ways they can work together to "defend the profession and our pensions".