The debate is about improvisation, so I can only give you some simple hints, and the rest can be played by myself.

First of all, you should list more violent incidents in schools, especially those caused by teachers, and then give more examples of male teachers.

Secondly, for this debate, the other party will definitely start from a small point, that is, cite a lot of trivial things in life, so you should start from a big point, that is, cite events that can shock everyone, giving people the impression that campus violence has reached a very serious level.

Finally, I wish you success!