Well, your still in high school, right? So, 50-60 people in a highschool classroom would be pretty large, but in the classrooms here (that are large enough) it doesn't feel that big. I've never been in one of those high-ass lectures or anything, but that's mostly because my program is kinda limited. As I said, when we had an uptake of 145 people (my first year) that was a record uptake. The course had never taken that many people in at one time. This year is even larger, but I don't know the numbers.
If you were to take business or one of the more popular programs, you might have a much larger class. (though still not likely anything close to 1600 people). Georgian college isn't all that big.
I do kinda feel sorry for the teachers thouh. They are still dealing with enough people that they can't just get TAs to mark everything and just do lectures and such like the profs in large universities, but they have to deal with teaching (both in lectures, and in labs), and grading (both assignments in the lectures, as well as lab reports) something like 250ish people, in some cases, depending on what courses they teach (whether they teach 2nd and 3rd year, 1st and second, all, 3, etc.)