+Fight+The+Illness+

A few ideas. In my marketing class when I was at school we had to give a presentation and EVERY single person was EXTREMELY nervous, sweating, stammering, making dodgy eye-contact, etc. No one was mean or rude to anyone else because everyone understood how anxiety provoking the situation was and that they were all in the same boat. I guarantee you that the kids in your Spanish class will feel the same way and be very supportive. You could even say if you freeze up, "I'm sorry, this makes me a little nervous" and laugh like it's a joke. People will laugh WITH YOU not AT YOU, because they totally understand. You are not expected to perform very well in this sort of situation, you are simply expected to try your best, trust me. It's not a high-stakes acting audition.

Another thing you can try is this: when you get nervous look at someone in the eyes. I know it's anxiety provoking but you will find that they will look away first, making you feel more powerful and in control. It will seem like you are very confident. Faking it is sometimes the best way to get it and people will think you did a great job. Just try it with ONE person and if you can't handle it then don't worry, but I think it will work.