Teachers across Hertfordshire will be striking next week over pay, pensions and workload.
Unison, GMB and Unite are planning to call upon members working in local government and education to take strike action on the same day, which will be July 10.
Christine Blower, general secretary of the National Union of Teachers, said: "The Government is still failing to make progress on our trade dispute over teachers’ pay, pensions and workload. The talks are still only about the implementation of Government policies, not about the fundamental issues we believe to be detrimental to education and the profession.
"For teachers, performance related pay, working until 68 for a full pension and heavy workload for 60 hours a week, is unsustainable.
"This action is the responsibility of a Government and Education Secretary who are refusing point blank to accept the damage their reforms are doing to the teaching profession. The consequences of turning teaching into a totally unattractive career choice will most certainly lead to teacher shortages.
"Strike action is a last resort for teachers and we deeply regret the disruption it causes parents and pupils. This date has been chosen to cause minimum disruption to examinations.
"Teaching is one of the best jobs in the world but is being made one of the worst under Michael Gove and the Coalition. It is time they listened. Michael Gove can still avoid the strike by engaging in serious negotiations on substantive issues."