Greenfields School & Sports College in Northampton will re-open on Thursday.
On Monday, a chemical gas release incident occurred in the plant room at the school. The site was evacuated and the emergency services attended. Pupils and staff were screened by paramedics on site and two Amey staff were taken to hospital but released later that day.
The school has been screened for any remnants of gases. A full investigation will be undertaken by building managers Amey Ltd and Northamptonshire County Council to establish the cause of the incident.
The school will remain closed tomorrow and is scheduled to re-open on Thursday 6th February.