How do I confront a teacher who has been bullying my child at her school?

My daughter is in the 3rd grade and she has this teacher who is absolutely horrible. Her school is set up differently than a normal school where the kids go to a new classroom and have a new teacher every year. Instead it’s sectioned into three groups kindergarten 1st and 2nd grade are all together, 3rd 4th and 5th are all together and middle school is together so my kid will have this teacher for the next two years.

My daughter used to love school and was so excited everyday to go and luckily her school has been in person for the past two school years. They shut down at the beginning of covid but was back in person the following school year. At the beginning of the year she was still super excited to go to school but that has been dwindle during the school year. She’s mentioned multiple times that she doesn’t like this one teacher and how she’s really mean to her. I’m going to be honest at first I thought she was just being a bit dramatic. This changed in January when I helped my daughter with her math homework. I showed her how I was taught and she understood it perfectly and was able to do the whole 4 page packet pretty quickly. I double checked one page where she had to write her work down and she got it all correct. The following Monday I picked her up from school and she started crying saying how the teacher had made her stay inside during recess to redo all her homework because it wasn’t done in the correct way and it was done in an advanced way that the 5th graders where doing it. I talked to the teacher and explained that I wasn’t ok with her punishing my daughter just because she did her homework in a different way. She said she was sorry and I thought that was the end of it. Boy way I wrong.

Today I received a phone call from one of the other moms in my daughters class. Apparently this teacher is playing favorites with the students, making fun of the kids she doesn’t like, rolling her eyes at students, completely ignoring the students she doesn’t like if they need help, and apparently talking bad about me to other moms in the class. Honestly my outward appearance can be somewhat intimidating since I’m covered in tattoos and piercing and I’m also a lot younger than everyone else. I had my daughter at 18. The mom who called me I guess also talked with about 10 other moms who’s children have been targeted by this teacher and she wants us and our kids to go to the principal to report this teacher. I’m all for this but I also have this fear that if we do this and they don’t do anything it could make my kid and the others bigger targets for this teachers. I need advice on how to handle the situation. Please help! Also there have been more issues but this was long already!