Denver Public Schools is weighing a new idea to help keep kids out of hot classrooms.

The proposal, led by DPS Board of Education member Scott Baldermann, would adjust the academic year for the roughly 60 schools, or about one-third, that don’t have air conditioning. The first day of school, 9News reported, would be pushed to early September, while the last day of school would fall in June.

“We know there are times during very high temperatures in the first weeks of school that have resulted in hot classrooms that challenge teaching and learning conditions,” DPS Superintendent Susana Cordova said Thursday night at the DPS Board of Education meeting. “So, in an effort to mitigate the heat for the students and staff in the buildings without cooling solutions, the possibility of offering an alternative calendar for the 20-21 school year, which would include a later start date and later end date.”

Teachers have protested in the past for students who they say have been prevented from learning because of high temperatures.

The district currently doesn’t have a rule that dictates at what temperature it can cancel school, but The Denver Post reports that principals can cancel classes if they think temperatures pose a threat.  

Cordova said that the impacted schools could opt-in to the new calendar schedule, but that it wouldn’t be required.

Installing air conditioning for every school would cost more than $200 million, the district said.

Adjusting the calendar by two weeks, Baldermann said, provides an “opportunity to find a cost-effective way to alleviate some of that heat without putting air conditioning into our buildings. We’ve just got to weigh the benefits and figure out what is the most effective way with the limited budget that we have.”

Baldermann said that the board will conduct a survey among the would-be affected schools before voting on the proposal.