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Article 29 Teachers should treat students equally in education and teaching, pay attention to their individual differences, teach students in accordance with their aptitude and promote their all-round development.
Teachers should respect students' personality, and must not discriminate against students, and must not punish students with corporal punishment, corporal punishment in disguised form or other acts that insult their personal dignity, or infringe upon their legitimate rights and interests.
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Article 37 stipulates that in any of the following circumstances, teachers shall be given administrative sanctions or dismissed by their schools, other educational institutions or educational administrative departments.
(a) deliberately not to complete the task of education and teaching, resulting in losses to education and teaching;
(two) corporal punishment of students, the education is invalid;
(three) bad conduct, insulting students, bad influence.
If a teacher falls under any of the circumstances listed in Items (2) and (3) of the preceding paragraph and the circumstances are serious enough to constitute a crime, he shall be investigated for criminal responsibility according to law.
I suggest you go to a lawyer to collect evidence and sue in court.