As long as your grades are excellent, it depends on what you say, and the most important thing is to convince her. I guess she wants to have an inspection of you, combining your talent and achievements. After all, she is good at smiling, so she must come up with something substantial when she speaks, such as your usual performance and achievements. Think about her difficulties, that is, there are good students there, you are afraid of other teachers, other parents have opinions and so on.

If you want to convince her, you can only show your proof. For example, let her give you a chance to take an exam. Just tell her that I hope you can enter an environment where everyone is sprinting, and I hope you can prove that you will win glory for the school with your own actions. Just tell her that you firmly believe that you have the confidence to stay in a good class, and you can prove it with your own strength. If you are really interested, you can chat with me. This is my account.