Once you get there, skip you teacher surveillance asap and go ask for political asylum? ;)

More seriously:

Anything important that I should be aware of?

Not knowing you, it's a bit difficult to suggest anything. I mean, I doubt you're concerned but I've witnessed US citizens (I fancy your from the US?) complain that people in France (my country) were speaking... French, like for real. So, be aware that Germans will most likely speak their native German. And, yep, a lot of them do speak English, like us French do, just don't expect all of them do.

Some EU citizens, from Germany too, are getting quite tired of US accelerated devolution into a dumbified mob-ruled country. Your POTUS insistence on insulting and threatening almost every single EU nation is also not helping much. So don't be surprised some people may not be that welcoming to begin with. Edit: take that as an opportunity to show then they're wrong.

If it's a week long trip, don't allow your school to say all you should and should not do in Munich (see? I did not suggest anything you should visit) ;)