Schools could close next week when teachers go on strike.
Members of the NUT and NASUWT will walk out on Tuesday in a row over pay, pensions and workloads.
Together, the unions represent nine out of 10 teachers nationally.
Wakefield Council said it will do all it can to help maintain public services during the strike action, but union officials said few schools will be open as normal.
The action could see lessons cancelled and parents forced to make alternative childcare arrangements.
The unions say the government’s failure to enter into meaningful talks, has left them with no choice but to strike.
Sally Kincaid, Wakefield branch secretary for the National Union of Teachers, said: “Teachers don’t want to have to take strike action. However the secretary for state for education, Michael Gove, has given us no alternative. We are striking to defend not only our pay, pensions and conditions, but also because we deeply care about the quality of education of our pupils.
“We want the government to listen to professionals and stop using education as a political football.”
Helen Grantham, Wakefield Council’s service director for organisational development and performance, said: “We’re providing schools under our control with guidance about managing practical aspects of strike action.”