Teacher cursing at students

Today my 8th grader came home and told me that she went do an errand for the principal and when she went to the gym where they wait for the bus the on duty teacher asked where she was and she told her she went find another student for the principal well she didn't belive my child and had her sit on a bench then about 10 mins later she asked the students if they needed the restroom and my daughter said yes I do and the teacher got nose to nose with my daughter and said I didn't fucking ask you...now my son saw this also so I know it's true..what should I do