It's a tough call. I did research for an educational resource in a Juvenile detention centre some 20 years ago, spoke to a group of boys and gosh it was an environment I'm glad I was never trapped in. For me, one of biggest fears about being trans was that I could be imprisoned with men as a man. That fear was stronger before I transitioned but it is still there.
Anyway, my impression of the detention centre was that every kid was acting tough because they needed to present that front, in a group of more than four or five that tough act became a line of defence. The more of them the worse it became. So that's what you are up against in a room full of them. So if you're trying to tell a bunch of kids, some of whom have had very little respect shown towards them by adults, family and peers - and some who have done quite violent things - the chance of getting through a message around bullying, especially of trans people, seems to me a tough call indeed.
Good luck though, I hope you have a lot of success!
