This study examined whether the use of a norms-based simulation in a communication class can influence students' misperceptions about college drinking. Participants (N = 462) were enrolled in two undergraduate communication courses: one in which the simulation was used and another that served as a control. Results indicated that participating in the simulation resulted in a decrease in beliefs about college drinking myths; moreover, students' perceptions of social drinking norms were related to their actual drinking behaviors. Findings indicated that the campus atmosphere and social networks promoted alcohol consumption. Results support using a norms-based simulation to provide information about dangerous drinking behaviors while at the same time teaching relevant communication principles. (Contains 1 table.)