Hello CH,
I am Cheryl Wozny, author of the Verbal Abuse in Relationships blog at HealthyPlace. Thank you for sharing your account with verbal abuse and children. It can be hard to navigate when you first witness it happening. It takes a lot of courage to try and change a negative situation.
Youngsters often don't know how to act and look to adults for guidance, so I am glad you are working as a TA with these children.
I encourage you to visit our Resources page here: https://www.healthyplace.com/other-info/resources/mental-health-hotline-numbers-and-refer… for some ways to find assistance in your region. Even talking to someone can help you process your feelings and strategize a plan to approach the teacher. However, if that doesn't bring positive change, you may have to seek help from someone else at the school when approaching the subject.
I wish you and your entire classroom family health and wellness.