I made an assumption based on class size. The person I was replying too stated 180-200 students. So the assumption was that they were meaning a lecture hall of 180-200 students, which is typical for a college course. That is not typical for a high school course, in which case, I'm going to go out on a limb again and say that it's 180-200 students over 5-6 ~30 student periods.