As a taxpayer and parent of two CUSD95 graduates, I've read with interest the articles regarding the struggle of District 95 to maintain acceptable temperatures in the classrooms of schools without air conditioning. I believe there is a solution to the problem that no one has addressed -- start the school year after Labor Day.
Temperature averages for August range from a high of 83 to a low of 65, September averages are 76 and 57. Even pushing the school year another week or two into June (80/61) typically will not expose the students and staff to the high temperatures found in August.
Also, June, on average, has more rainy days than August, helping to combat high temperatures due to cloud cover. Our neighboring states, Wisconsin and Michigan have gone so far as to legislate that K-12 schools cannot begin before Labor Day.