This has been mentioned before, but I never attended a school where the classrooms didn't have windows, usually one wall was all windows, and in my elementary school, the wall on the opposite side had upper windows. But our schools were all built in the 1950's, without air conditioning, in an area where in May, June, September and October it can get to 100 degrees. And summer school would be miserable.I’m lucky enough to have a window in my classroom - it overlooks a road but whatever! I like the natural light.