Miss Lu:you need a calm and positive mind first to come up with some ways to solve the problem, after that you need to take some suitable actions and interact with the students about their ideas.Finally, do some things in advance next time to avoid happening again.
Miss Xu: Firstly, you need to stay calm, next, you need to accept this situation cause things have happened, after that, you have to talk the student that have problems privately.In the end, it is important for you to set some rules in class.