Dennis never tried very hard in school. He never listened to his teacher or did his homework. When his report card came out, he was so upset that he received an F. His mom grounded him, and he felt miserable for weeks! Dennis decided to start trying in class. He listened to the teacher, completed his homework, and was so excited to see that he got anA on his report card! Not only was Dennis happy, but his mom and dad were happy as well. They rewarded Dennis by taking him out to his favorite movie. Dennis felt like a new person.