Sister and her friends do not like gym because of all those exercises Teacher Jane makes them do. She remembers when Lizzie got out of gym by having an excuse note written for her when she sprained her wrist. When Sister is exiting the school bus at home, she trips on a rock and sprains her ankle. Mama writes her an excuse note, so Sister does not have to do gym. A few days later Sister is playing hopscotch and jump rope with her friends when teacher Jane sees her and gives the excuse note back to her. Sister is upset because her ankle got better. Brother tells Sister that gym can make her a better soccer player, so Sister decides to give gym another chance.