Student Exchange Programs

I’m looking into a few exchange programs that I might use to go to France and study abroad. I should be gone for about a semester as a high school student. I only have a few specific questions:

1. Will all my classes be in French?

2. Do the teachers speak english as well?

3. What classes will I be able to take?

Please try to answer to the best of your knowledge. Feel free to add any additional tips.

Previous Exp:
I’ve been to France once for a guided tour. I’m taking French 2 at my high school. I also have a few friends that live in France whom I occasionally correspond with.

Merci!