Abstract
The Crossroad game is a social card game that is used for training to deal effectively with difficult situations such as conflicts under disaster situations. In this paper, a social game, which is used for improving the teamwork of students in an exercise class, has been proposed based on the Crossroad game. In the proposed game, a question is displayed on a computer screen and the players have to select one alternative, yes or no. The questions related to a group work in a practice class. The players have to describe the reason for their own decision. Then, the player who votes for the majority opinion gets a point. The participants can declare their opinion easily because this game does not require one to think “what do I think about the problem,” but “what is the majority opinion?” As a result, the players can learn several opinions that they did not consider and teamwork improves.