John Dixon/The News-Gazette
A fan blows a slight breeze on students in Lindsay Polarek's Geometry class At Central High School in Champaign on Thursday Aug. 22, 2013. By 10 am the temperature in the third floor classroom had reached 88º. Principal Joe Williams said it is common for temperatures to reach into the 90's in the classrooms by afternoon. "Our teachers do a a fantastic job of engaging our students in difficult conditions, our students do a fantastic job of looking past the heat to learn.