More than 2,600 schools were closed in England on Thursday by a teachers' strike over their pay and working conditions, the education ministry said.

Union leaders proclaimed the walk-out a "great success", saying more than 80 percent of schools in the four targeted regions -- including London -- had been affected in some way.

They are mainly concerned about proposed pension changes and government plans to replace national pay deals with performance-related salaries set by individual schools.

"We are very well aware of the disruption this causes to parents' working lives as well as their children's education," said Christine Blower, general secretary of the NUT, which organised the strike with the NASUWT union.

"Unfortunately, with a government that will not negotiate on the issues of our dispute over pay, pensions and workload, we have been left with little choice."'