You should know all of this is completely normal. Most stutterers have physical manifestations, and eyes closing/twitching is probably the most common. I agree with natabean that disclosing your stutter to your teachers is very important. Not only will it give them a complete scope of your behavior, but it's also possible your school has a speech therapy program. I *don't* agree that speech avoidance is a good strategy. Honestly, and it'll suck to hear this but it's true, a good teacher will make you participate. Not only because it's what's fair, but more importantly, not doing so will trigger a cycle of avoidance that will haunt you for a good chunk of your life. The biggest part of accepting your stutter is learning to speak in front of others without fear or dread. That's not something that can happen if you avoid it. I say all this while knowing that my English teacher forcing me to give oral presentations were some of the top 10 worst experiences of my life. But as an adult, I know understand why they did it and can't say I'd disagree.