Then answer your questions by category:
1\ answered.
2\ You can resubmit the appraisal, but if there are reasonable reasons, such as unreasonable grade or illegal process, the court will accept it, but you have to pay compensation;
They won't get any benefit by delaying time, because they are plaintiffs, so when to sue is their right.
The court should not support the medical expenses and related compensation unrelated to the injury.
5\ At present, the appraisal conclusion is minor injury, but it does not constitute disability. Statutory disability is classified as 10. If it does not constitute disability, it is unlikely to support compensation for mental damage.
6\ The work itself has little to do with the case. Because the school has the right to decide whether to continue employment, which belongs to the scope of labor law. Generally speaking, minor injuries will not be sentenced, but as I said, it depends on whether the appraisal constitutes a certain level or whether there are other serious consequences.
If you hire a lawyer, if you are an authentic practicing lawyer, you can have the right to investigate and consult relevant information. But the court will not judge the authenticity. If you want to prove that it is counterfeit, you need to provide evidence.
You didn't say how much the lawsuit cost, so you can't judge the lawyer's fee. The legal fees shall be borne by the losing party.
9\ Yes, but whether it will be paid in full has yet to be decided by the court.
10\ The school and your father are both defendants.
These questions you ask are actually not the key points, mainly the injuries and losses of the other party. Because this is directly related to the success or failure of the case, I suggest you get to know each other's situation and the attitude of the school. If possible, you should ask a lawyer to intervene as soon as possible.