Interesting to see how Illinois splits it's high schools into 4 classes. As you'll see they have ton of schools enrollment under 100. All privates have 1.65 multiplier used to determine classifications. I don't think the 3A folks would like this so much as there is a large disparity of schools between 557-1368. 788 schools total. http://www.ihsa.org/Schools/EnrollmentsClassifications/NumericEnrollments.aspx