It's crazy to me that some schools don't even have ac. Mini splits are cheap as hell. From an email I got recently:
Provincially, the percentage of schools with more than 25% air conditioning coverage is 44%. Since 2017, the OCDSB has made considerable progress improving the cooling systems in our schools:
70% of schools have air conditioning in some or all learning spaces (an increase from 41% in 2017)
25% are partially air conditioned to varying levels, but not in classrooms
5% of schools have no central air conditioning (a drop from 34% in 2017).
I'm dating myself here, but when I was in elementary school, it was rare that it was needed in June and September. It's definitely not the case anymore.