Then the teacher will give them another chance, but next time they need to show the proof.

然后老师会给他们一次机会，但是下次他们需要显示出证据。

youdao

For a generation that's supposed to have forgotten how to be polite, this kid--who was so frustrated with school that he attacked his teacher--was proof that young Japan is still pretty decent.

CNN: ASIANOW - TIME Asia