Why did Mr. Keesing punish Anne? What was the punishment and how did Anne finally stop Mr. Keesing from punishing her?

Answer – Anne could not give up the habit of talking in the class. Mr. Keesing was her mathematics teacher. He also like the essays written by Anne Frank. Due to Anne talkative habit, Mr. Keesing gave him a punishment of writing an essay on an unusual title, "Quack, Quack, Quack". Anne wrote this essay in the form of a poem. It was about a mother duck and the father swan. The father bit the three ducklings to death because they quacked too much. It was a satire on Mr Keesing. But he took the joke in right way. He read the poem to Anne's class and other classes also. He allowed Anne to talk in the class and never again gave her extra homework.