Amid calls for Education Secretary Michael Gove to quit, the National Union of Teachers (NUT) vowed to step up their campaign of industrial action at their annual conference in Brighton.
Delegates overwhelmingly backed a priority motion which calls on the union to co-ordinate national strike action in the week beginning Monday, June 23, if “significant” progress is not made in resolving the long-running dispute.
The NUT has said it would not rule out more than one day of strikes and the resolution also left the door open for further action in the autumn.
The move, which has been condemned by the Department for Education (DfE), leaves hundreds of thousands of schoolchildren across England and Wales facing disruption to lessons.
Afterwards, delegates stood for several minutes cheering and chanting “Gove must go”.
The vote comes the day after another teaching union, the NASUWT, agreed to continue its campaign of industrial action, warning it is willing to call its members out on strike if necessary.