I've been using this game with my classes this week and it's worked really well.
ESL Cafe's Idea Cookbook - How well do you "know" the teacher?
However, the classes so far have been made up of only girls. Tomorrow I take two classes which I expected to be made up of boys. I'm female & 28 years old, they're in their mid-teens. Do you think I'll just embarrass them by saying 'Ok, this is now the teacher, can you ask her some questions about herself'?
I can't see why; if you get unwanted questions, just field them.