The University of Southern California has a great freebie for teachers called the Pathfinder card game.
Goal: Pathfinder’s goal is simple: use games to arouse interest in, inform, and enable high school students to successfully make the journey to and through college.
Simply fill out a short form to request a complimentary copy. In return, they ask that you:
1) that you facilitate at least one game session and
2) that after playing the game, you and your students complete a brief online survey in order to provide us with feedback on the game.