Schools in urgent need of repair have told Panorama they are struggling to keep children warm in buildings that are "not fit for purpose".
At one primary in Devon, temperatures are so low that children keep gloves and coats on during some lessons.
The head teacher says despite parts of the school being seemingly impossible to heat, he has been told it does not qualify for extra money for repairs.
The Department for Education (DfE) says pupil and staff safety is "paramount".
According to the government's own figures, the average primary in England needs £300,000 worth of maintenance or upgrades, while the average secondary school needs an estimated £1.5m.
BBC Panorama's investigation reveals what some of that damage and decay means for pupils and teachers who experience it every day. We found:
- A secondary school in Dumfries and Galloway where draughty windows are stuck together with sticky labels
- Another in North Yorkshire that teaches some lessons in marquees in a playground, because two thirds of its building became unusable after the discovery of potentially dangerous concrete, known as Raac
- A further secondary school in Essex that has a no-go area after a Raac problem led to the discovery of asbestos
- A primary school in Greater Manchester that has faced multiple evacuations because of flooding and worrying levels of potentially explosive sewage gas
At St Peter's Church of England Primary School in Budleigh Salterton, Devon, some children work in unheated modular buildings - nicknamed "the sheds" - which were built in the 1960s and were supposed to be temporary.
