A few of the wealthiest school districts have air-conditioning and some have it only in certain areas of the school. Our high school only has it in the auditorium, which is better than most! I guess the powers-that-be figure that we are closed for the worst two months, and both June and September are not full months - so the kids can sweat a little while money is saved! It can be brutal however! LOL - we do have indoor plumbing however!!!