Teachers in Bridlington are set to join others across the country in a day of national strike action.
Members of the National Union of Teachers will strike on 26 March in a dispute over pay, pensions and conditions.
Teachers are unhappy at the introduction of a new performance related pay structure, changes to pensions and long working hours.
In a letter to parents Sarah Bone, headteacher at Headlands School, said: “I have made the difficult, but necessary decision to close the school to all students in Years 7, 8 and 9 on Wednesday 26 March 2014.
“I understand that this decision may cause difficulties for some families but the well-being of all our students remains my principle concern.
“In the event of the strike being called off the school will open as normal.”
Sarah Pashley, headteacher at Bridlington School, said; “We are aware that a large number of our staff are NUT members and although we do not know exactly if all of them will support the strike we have decided on a partial closure of the school.
“There will be no lessons for years 7, 8 and 9 but the school will remain open for years 10, 11, 12 and 13.”
Christine Blower, General Secretary of the National Union of Teachers, said: “Two in five teachers are leaving the profession within five years due to intolerable workload pressures, performance related pay, increased pensions contributions and working until 68. Our concerns have to be addressed if a crisis in teacher supply is to be avoided. It is not for us to comment on the decisions of other organisations but the NUT continue to believe that joint action by teacher unions is the best way to defend teachers and the education service.
“Now more than ever teaching unions need to stand together to defend the members we represent and to speak with one voice.”