Thank you all so much for your replies. I did meet the teacher today and will have an appointment with her soon to talk about my daughter and her sensitivity. Of course, the teacher was fine to the parents, if not particularly friendly. The girls are in the only french immersion school in our town, so I am very hesitant to remove them. They love being in the immersion program so she would be very set back if she was suddenly switched to an English school. I plan to, as most of you say, bring my concerns directly to the teacher in a non confrontational way, more of a "how can we work together to make this a positive year for her" kind of way. I am also going to document everything in a diary I'll keep, in case the next step is going to the principal. The teacher is definitely aware that I am a hands-on parent who will be there a lot, and who will pay attention to what is going on in the classroom. I also mentioned to her today that I also work for the school district, so perhaps that will have some impact.
You are right in that if this is indeed her last year she is highly unlikely to change all of a sudden, and it's unlikely the administration will do anything about her. So my option at this point is just to be very visible, talk to her about the best learning environment for my child, and keep talking to my girl about her day and what is happening. If worse comes to worse I'll do what my sister did for her son when he encountered the same kind of thing. She had a meeting with her son and the teacher, and then very clearly said to her son, in front of the teacher "______ you don't need to be afraid of Mrs. _______! She's not here to yell at you or be mean, she's here to help you to learn. That's her job and what she loves to do! She's not going to yell at you, she's going to help you when you need it and if she can't then she's going to call me and we'll talk about it. Remember, Mrs. _______ is a teacher, and teachers aren't going to yell at their class, they are going to encourage and teach their class!"
The teacher never yelled again that year, apparently!