I had a teacher who had me, and others, stay after school for allegedly talking in class. Told us to start writing "I must not talk in class" until she returned to the classroom.

When she returned she told us to stop. Had us write mother and draw a line for mother to sign. Same with father.

When I gave my note to Mom she tore it up and trashed it.

Next day at school teacher asked for my signed note. Did not like my explanation and marched me to the office and called my mother.

After my mother got through talking to her, I never had trouble with that teacher again!