Tonton Streaming Little House on the Prairie (1974) S1E2 - Country Girls

Laura and Mary start school for the first time. That is where they meet Nellie Oleson. Since Laura hasn't been to school before, she tries especially hard with her schoolwork. The students have to write an essay to present in front of the class. Laura recites what she would have written on the paper if she could have, instead of what was actually written on it.