Dwayne Reeve, director of education for Good Spirit School Division, says air quality tests for Langenburg school came back Friday afternoon.
He says they confirmed that the environment is safe for students and staff to return, but there is still work to be done to get classrooms ready.
Reeve says the plan is for Grades 10 through 12 to return to class Monday, while they hope to have Grades 5 through 9 back on Wednesday.
Reeve adds that there will be a public meeting for parents on Tuesday evening at the town's elementary school gymnasium.
Last Friday, a letter was sent to parents and staff of the school from the school division saying classes would be suspended for a week due to air quality concerns.
In the past, the area under the school has been put under negative air pressure to prevent air flow.
As staff returned to the building and raised concerns, an air quality expert the school division hired suggested it was best to shut down the building.
Students had only returned to the building for a few days when that decision was made.
Reeve said the school division has taken steps for several years to improve the situation.
The building is slated to be replaced over the next two years.
Langenburg is 230 kilometres northeast of Regina.