Some students at Hillsborough County School have been told to take breaks while their exams are taking place.
Staff have told parents to take the children to school to complete their work.
It is a move that is set to cause uproar among parents.
A statement from Hillsborough School head teacher, Debbie McGovern, said: “There is a great deal of information available on how to manage and manage work.
I have asked the Head of HR to advise the principals that, when a school has a desk available for students, it would be helpful if they could use it to assist students with tasks.”
It comes after it emerged that some schools were planning to use desks for students at weekends to help them complete work on their exams.
The issue is also expected to be raised at next week’s national assembly, which is due to debate whether to ban sitting desks for all students.
Many parents are worried about the impact the new policy will have on the quality of learning for their children.
In a letter to parents, the Headteacher said: “As a school, you have an obligation to ensure your children are fully equipped for the demands of the learning environment.”
The statement from the Hillsborough Education Authority said it would discuss the issue with the school at a later date.
School desks can be bought for as little as £5 each, with each costing between £2 and £4.