Better than the other prisoner's game, make it more like society and challange people's ability to be truly moral. Give each of N students the following on a slip of paper:
You have (N-1) points. You may give any number of points away to any number of other students by writing their names below; for every point you give to someone else, they get 2 points added to their total. All of the other students have the same conditions. You are encouraged to communicate, but you must write down your decisions in private.

After all point giving is tallied, you will get all points you chose not to give away, plus the points you were given (2 for every 1). Additionally, you get as many extra points as there are people with strictly fewer points than you. The number of points you get will effect your grade in this class.

Name: ___________________________________________ # Points: ______
Name: ___________________________________________ # Points: ______
Name: ___________________________________________ # Points: ______

There is the potential for more points total here by putting some people down (will people choose Utilitarianism? Each person for himself? Rawlsian fairness?)