A school will be closed until at least Thursday after an arson attack destroyed a block of classrooms, causing £500,000 damage.
A 12-year-old boy was arrested after the fire at Sir Henry Cooper School on the Orchard Park Estate, in Hull.
It is thought to have been burning for an hour and completely destroyed the block before fire crews were alerted.
Two classrooms, a computer room, dining room and staff room were also destroyed in the fire on Friday.
The damage was assessed by experts on Monday.
Education officials said school staff would be available at the Orchard Park Community Centre and St Michael's Youth Club, on the Orchard Park Estate, on Tuesday and Wednesday to offer help to pupils.