Non stutterer here whos trying to give support. If you think its inappropriate tell me to gtfo. As i can see (correct me if im wrong), it does not have a time limit. Noone told you how long it has to be. Take your time. They should know that you stutter, if they dont, clarify it in the beginning. Also if you have to send it in, the classmates (if you have them) wont have to hear it. So you dont have to fear potential embarassment from them. Only the teacher will see it, if I interpret the assignment correctly. Dont worry, you got this. It will be fine. Even though I am a stranger from the Internet who cannot relate.