I do agree with other parents' reply, please do gather a few parents and feedback to the principal.
As for your child, be more encouraging. My boy (N2) don't like his teacher (she is also impatient an fierce towards the children) and don't like to go to school too, my husband kept telling him he have to go school to learn to be a smart boy, by being smart, everyone will like and love you. The nagging does help in our case.
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