A head teacher in Devon has launched a funding challenge to raise £100,000 for urgent upgrades to a temporary classroom which is 40 years old.
Steve Hitchcock, from St Peter's Church of England Primary School in Budleigh Salterton, said he had lost all hope of the government providing all the funding.
Mr Hitchcock said his pupils were paying the price because schools had not had decent government investment for more than a decade.
The Department for Education said it had allocated "just under £1m to the responsible body for St Peter's CofE Primary School".