Yvonne Johnson wishes that the Government would provide more money for school buildings so she does not have to teach religious education in a dirty hut with a leaking roof.
The head of RE teaches in two mobile classrooms at Wolfreton school, near Hull: "We do not have a telephone. ICT is a problem too - there is no computer or internet - and my hut leaks. The heating is really hot and stuffy in winter.
"It gets very dirty too because the children bring mud in off their shoes from outside. We need more money from the Government to improve the buildings. I have two RE rooms equipped for teaching RE, but because we have over 2,000 pupils at the school, we have to move a GCSE class to another area of the school which means staff have to carry materials over there."
Over the past four years the school has reduced its number of mobile classrooms from 10 to two, both used by Ms Johnson. A new science block replaced seven of them.
Ms Johnson would like the Government to provide more money for school buildings so that the school could be on a single site.
Currently it is split over two sites, which are 1.6 miles apart: "We do get an allowance to get between the two sites but it makes our day very busy.
If you are not doing break duty you end up using your breaks to commute. We have land which the new school could be built on but we are crying out for the money."
Ms Johnson, who joined the school in 1999 said: "Just before my arrival the hut burnt down so there was some hope it would be replaced. But no, we got another one.
"The head has offered to buy some blinds for it so we will not have to stick paper to the windows to keep the sun out."
"It is not fair."