When I got there, I was surprised at how "old" high schoolers look. They're almost full grown adults!
The ratio was really low, 8 students per class. The first section I covered was pretty easy, and the class was very well behaved. The second section was more rowdy and gave me a run for my money.
But all in all, it was reasonably enjoyable. I also remembered algebra, to my surprise, so I could actually help some of the kids.