While sustainability is increasingly recognized as an important ethical principle, teaching ethical reasoning skills appropriate for sustainability is problematic. Using non-cooperative game theory, we simulate problems of collective action where tension exists between individual interests and group benefit using grade points. Each of our ethics games brings students completely around the Kolb Learning cycle, which includes four stages:
       1. Abstract conceptualization.
       2. Active experimentation.
       3. Concrete experience.
       4. Reflective observation.
Our pedagogy is organized into game modules that start with a review of theory and relevant concepts in the form of assigned readings and lectures.