I will advice her to speak softly and politely as the same thing can be said politely and there is no need to behave like animals. I will tell her that its good to participate in class but she should also let other students keep their opinions also. They should also be given a chance for giving their answers. She should simply raise her hand if she wants to answer. Tell her to behave nicely with all others so that everyone will like her and be friends with her. If also she does not take it seriously then tell all the students to ignore her and not talk to her then she will understand her mistake or send a letter to your class teacher to take any strict action.