It is hard students to get good grades in school. But the hardest problem met by students' parents is that the students do not want to get good grades, and even an eight-year-old child could take examples of "successful without good grades" people such as Steve Jobs and Bill Gates to explain his bad grades. To improve students' academic performance, education professor Roland Fryer decides to let students get paid on the basis of metrics such an attendance, behavior, tests and class work.