Caerphilly Council says a special meeting will be held next Tuesday to discuss how to accommodate the majority of pupils at Cwmcarn High school.
900 pupils attend the secondary school which has been closed since last week after a report raised concerns about asbestos on the site.
Year 12 and 13 pupils will return to lessons at a new building at the school on Friday.
Parents are expected to attend the meeting as Caerphilly Council decides how to get pupils back into lessons after asbestos concerns.
As Cwmcarn High School remains closed one Asbestos expert warns that other schools in Wales are likely to be affected.