Advice about participation in school

Advice about participation in school hey! I wanted to ask for some advice from you guys. I’m a highschool student who struggles with stuttering. During the first semester of the year, I would participate a lot in all of my classes. Ever since the start of semester two, I’ve had a lot of trouble participating. About 2 days into the semester, I had a really bad block while answering a question in English class, which was very embarrassing for me. Ever since that day, I’ve been extremely anxious answering questions and the anticipation leading up to it. A week into English class, I stayed after class and I mentioned how I have a speech impediment, and a hard time expressing my thoughts verbally to my English teacher. She said it was okay, and my participation had been great so far (we’re marked based on participation in discussions). My parents sent the teacher a follow-up email after our chat. Now, I see she marked my oral participation as an 80%. I know that this may seem good, but to me it’s not. This made me kind of upset, knowing that I discussed this with her my speech issues and even offered to answer the oral/class discussion questions the day before hand and email them to her instead of having to say them out loud. What do you think I can do to achieve 100%? Is they’re anything else I could say to her? Thanks in advance.