West London schools could be closed next week if strike action by the National Union of Teachers (NUT) is upheld.
Members of the NUT have said they will walk out on Tuesday July 5 after a vote for industrial action won a victory margin of 9-1.
The union said its demands were to increase funding to schools and education as a whole and guarantee terms and conditions in all types of schools.
It follows government proposals to turn all schools into academies, which could mean changes to teachers' work and pay conditions as decided by a board of governors.
The NUT also called for the government to resume negotiations on teacher contracts to allow workload to be addressed.
Acting general secretary Kevin Courtney said: "School budgets are being cut to the bone. The effect on children's education is clear.
"Class sizes are going up, subjects are being removed from the curriculum, especially in the arts, while teaching posts are being cut or not replaced.
"Teachers' terms and conditions are being deregulated and worsened through the academy programme. Head teachers are spending time on school negotiations which should be spent on education.
"This is unnecessary, time wasting and ineffective.
"There is no evidence it leads to better results in schools and is fuelling the teacher retention and recruitment crisis."
