The teacher punished the students for copying homework 10 times, which was illegal. Copying punishment is corporal punishment in disguise. The purpose of punishment is to correct mistakes or strengthen students' memory. Every student has different interests. Teachers should teach students in accordance with their aptitude and adopt different indoctrination methods and teaching methods to further improve the teaching quality and level. Copying words more than five times, poems more than two times and texts more than one time is called copying. Students can complain to school leaders and education departments, and their units or higher authorities shall order them to make corrections; If the circumstances are serious, it shall be punished according to law. Corporal punishment in disguised form includes the following situations:

1, penalty copying, penalty copying words, laws, etc. More than five times in a row; Poetry, rules, etc. Be copied more than twice, and the text be copied more than once;

2, the size of the fine amount and the way of fine is not stipulated;

3. Being punished for being on duty or cleaning for several consecutive days;

4, was expelled from the classroom is not handled in time;

5. Without the consent of the leaders, suspend classes or stop students from participating in all activities at will.

Legal basis: Article 27 of the Law of People's Republic of China (PRC) on the Protection of Minors.

Teachers and staff in schools and kindergartens should respect the personal dignity of minors, and may not impose corporal punishment, disguised corporal punishment or other acts that insult their personal dignity.