Four mobile classrooms at a County Londonderry special school have again been closed due to problems including leaks, fungal growth and mould.
As a result, more than 30 pupils at Sandelford Special School in Coleraine face having to stay at home and learn remotely.
The pupils have already spent about a week out of school since September over the health and safety issues.
The Education Authority (EA) admitted it had been "a very unsettling time for families and the school, which we deeply regret".
