'It makes me feel so cramped': Schools affected by Raac still waiting for repairs
For over a year and a half, lots of pupils have been learning in temporary classrooms instead of their normal buildings, and many are still waiting to return.
That's because a material that was used to build some schools - called Raac - was found to be unsafe.
When this was discovered in 2023, thousands of children were forced to move into temporary buildings, with areas like school halls and libraries out of bounds.
The UK government has given out money to schools in England to help them remove Raac, as well as putting in plans for some to be rebuilt - but over 80% of schools affected are still waiting to have repair works completed.
Ricky visited one of these schools to see how pupils there have been affected.