I'm the mom of a high school-aged stutterer. Do you have accommodations through a special ed program? My son gets accommodations so that teachers can't force him to do presentations. Talk to your teachers. Email them if you have to. Usually my son is able to talk to them, and he can come in early before school or stay late and do presentations for the teacher only. Its a lot easier on him if its 1 on 1. He still feels self conscious that he gets something special, but its better than suffering in front of the class. Even if you don't have accommodations that force teachers to work with this, I think most would try to find a way to help you.