But most Americans, and many educators, still feel uncomfortable with the idea. According to the most recent national Phi Delta Kappa poll, one out of four Americans say students should be paid for their grades. There’s something about the practice that just feels… wrong. Isn’t there greater value in reading a good book than a certificate for cheese pizza? Isn’t education cheapened when its sum value is a remote chance at a limo ride? (Yes, some schools offer limo rides as incentives, as shown below in the video excerpt from the Freakonomics movie.)