How many students attend Arlington High School in LaGrange? Class sizes?

The student population is approximately 3,500. It's very hard to determine average class size. Graduating classes have about 750 kids, but I don't know how that breaks down into day-to-day classes. The student-to-teacher ratio (which some people confuse with class size) is about 17:1, but since not all teachers teach every period it's not an accurate representation.