I agree with the first floor that the cost of litigation may not be high, but it is troublesome and hurtful. It is recommended that the school handle it internally. And the amount is not large. Why go to court?

If you must play, you must first choose a good stadium. Generally speaking, the plaintiff is the defendant. If the account is transferred to a school, you can sue in the local court. When preparing evidence for litigation, it depends on the nature of your 600 yuan. If it is a medical fee, then the medical bill can be used as evidence. If it is something similar to compensation, the court will not support it. Because the school agreement is not called a mediation agreement, it is called a settlement agreement, and it has no legal effect. The other party can break the contract at any time. You can ignore that and sue directly to the court for medical expenses and mental damages. Then according to the court's decision.

Personally, it is troublesome and troublesome not to prosecute. Everyone can leave the court now, not to mention the big money, but to solve it at school.

Personal advice, for reference only.