It always breaks my heart to read these posts because it’s exactly what I went through in high school. If you are comfortable with it, talk to your teachers in private and let them know what’s going on. Some might say it’s taking the easy way out, but stuttering isn’t one of those things that’s does away with more public speaking. It just gets worse and a lot of teachers don’t understand it. Fortunately some of mine did. And then there were the asshole teachers who would specifically call on me because they thought they were helping me out. But anyway I would ask the nice teachers not to call on me to read or ask if there was another way I could submit the presentation and they were usually super nice about it. Or maybe look into a 504 plan. Sorry you are going through this