Abstract
In this paper I explain how to play and administer a game that helps teach students a lesson about the value of cooperation and the role of ethics and the law in obtaining the conditions under which cooperating is reasonable. I also discuss several applications of this Cooperation Game, primarily in courses in social and political philosophy, introductory ethics, and the philosophy of law. The game can usefully be played with a range of groups of students from small tutorial sections to large sections of over one hundred, and the game and post-game analysis can be completed in one or two classes