Religious prosecution at school?

I'd be more concerned at your geography teachers lack of professionalism. I'm a teacher, and I keep my atheism at home unless a kid asks point blank what I believe. If that happens then I tell them, and tell them to get back to work. I don't proselytise, I don't mock. If a teacher isn't being inclusive to all who come through his or her classroom door they shouldn't be a teacher, full stop.