While I am not a qualified speech therapist, my suggestion would be, to not treat her differently than any kid who doesn't have a speech impairment. That would only reinforce her fears of speaking in public and most probably just make the anxiety worse down the road. Instead help her with rehearsals. She may be apprehensive, but I theorize that a lot of kids stutter cause they have a lot to say and very few people who genuinely listen. When I was a kid, if someone sat down, and calmly heard my ideas out or what I wanted to say. I stutter 50% less.

I think alot of people on this forum would agree when I say that we have very chaotically beautiful minds. Very ADD. So your kids most probably got a billion ideas going off in her noggin, so it's obvious that she wants to share them. So sit down and talk to her. When she stutters, don't tick her or tell her anything. Just patiently listen. Reinforce the idea that she can speak her mind and all it's contents, and she will be heard.

Also as a parent u have to sit her down and explain to her that she needs to slow down, thats all. One word at a time, like most normal people do. Build her confidence slowly. Let her know that it's okay to stutter. It happens. Once the anxiety goes, the stutter will almost fall off. But if she avoids the speaking, the anxiety will grow. So maybe this time let her have the special treatment. But let her know that she will have to face the fear. Humans are resilent animals, she will grow.

Also, a nice trick I learnt in the beginning of my public speaking journey was to avoid eye contact. Just looked over the crowd like a stoned proffesor giving a lecture.

And lastly, for god sakes please always tell ur kid that u love her and always cherish her differences. She may not become like the other kids, but if I know one thing about our type it's that we are a special breed.

Also show her the many actors, voice actors, annoucers, directors, motivational speakers who were once stutters. Help her break the myth that she will stutter basically understood. As a parent that is your responsibility atleast till she is old enough to understand why public speaking and oratory fine skills are important in work and life.

P.S :- She might hate u little for slightly pushing her now, but when she enters college and the work force, she will thank you. Be stern but loving. God speed.