I'm going to flip your story a little bit. my first job, pot-degree, was also in a high school, but it was all girls (school's name withheld), and I had juniors and seniors. I had no problem staying in my place, but all those girls saw was fresh meat. Girls were offering sex, money, and everything else they could come up with, just so they could pass the class. My friends, of course, thought I was crazy for not taking up any of the offers, but the way I saw it and presented my response, none of them were going to share my jailtime with me.
Moral of the story though... it's not always the teacher that's the problem.