Many teachers in the NUT union are encouraging other school workers to join them on the picket lines.
When council workers struck in Birmingham in February, over 100 schools were closed after teachers argued that to keep them open without key groups of workers would compromise health and safety.
Teachers and other union reps should press for the same thing on 24 April. Andy Stone, an NUT rep in the Isle of Dogs, east London, told Socialist Worker, 'At our union meeting last week, the Unison rep came along to support our action.
'NUT members voted unanimously not only to back the strike but to call for a ballot for further strikes in the summer term.
'Our head has said she will close the school to students, but has also said she expects other staff to work during the strike. We have called an all-union meeting to discuss our response.'
The Socialist Teachers' Alliance is holding a national meeting to discuss where next on Saturday 26 April at the Bloomsbury Room, Canterbury Hall, Cartwright Gardens, London WC1H at 12 noon