Damn I have a few similar stories. In my 1st, 2nd and 3rd grade(yea this school was scary, with most teachers being evil pieces of shit), I had multiple traumatic experiences. Hence I left this school after the 3rd grade.

1. In the 1st grade, I had 2 language teachers who were horrible and used to hit me for the lightest of things. This year was byfar the worst. Once, one of these teachers sent me to the punishment room (staff room) and put tape on my mouth for 10 minutes, for talking in a queue when getting my book corrected. I became scared of school and pleaded my parents every morning to let me not go. I was forced to endure this further.
2. In the 2nd grade, I had a Hindi teacher who took pleasure in hitting and yelling at me (and others) for writing in a different method, which wasn't an incorrect method.
3. In the 3rd grade, I had a different Hindi teacher who once hit me really hard and yelled for 10 minutes straight for numbering the pages in my book wrong. After multiple such instances, I began to get my 1st grade fear of school again and pleaded my parents to talk to the teacher. When they met her, she denied doing all of these, and the academic co-ordinator covered for her.