In a new course subject, “Community Studies,” the author conducted a class that aimed at developing the ability to overcome conflicts. The class developed a new teaching material to teach utilitarianism and measured its effectiveness. The results led to the rejection of this approach; rather, they suggested that a range of criteria should be used, not just utilitarianism alone, in discussions linked to a more active real-world context, and that it would be effective to use “school rules” as teaching materials for that purpose.