Teachers are set to strike next week, disrupting schools across Waltham Forest, Redbridge and Epping Forest.
The National Union of Teachers said its members in England and Wales will be involved in action next Thursday.
Four schools in Redbridge have already confirmed they will be closed on July 10, including Goodmayes Primary in Castleton Road, Ilford, Gordon Infants in Rolfe Road, Ilford, John Bramston Primary in Newcastle Avenue, Ilford and Manford Primary in Manford Way, Hainault.
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."
An Education Department spokesperson said: "There is no justification for further strikes. The unions asked for talks, we agreed to their request and talks are ongoing. Ministers have also met frequently with the unions and will continue to do so.
"Further strike action will only disrupt parents' lives, hold back children's education and damage the reputation of the profession."