Happened to me in 1st grade. Can’t recall what I did. Teacher grabbed me by the arm, but she had long fingernails and she squeezed so hard, her fingernails pierced into the flesh of my arm, drawing blood. Nobody was concerned or got into trouble. How I hated her for that.
My 4th grade, the teacher so obviously hated the boys that a delegation of the girls went to the principles office to complain. She did not show up again after the next weekend.
Back in the long-ago days when a teacher would paddle a student, then a concerned parent would ask why he did that, the teacher would explain why, then the parent would pick up where the teacher left off!