The paper provides a rationale for using a decision-making model in teaching environmental issues, outlines specific steps in creating a simulation, and illustrates its use in the classroom. The objectives of environmental education are to provide learning opportunities for students to know, think, choose, and act regarding pervasive social issues from local to global levels. The primary goal of social simulations is to involve students in approximations of real-life, environmental issues. Ideally, simulations will encourage students to become actively involved in their own preparation to make political, social, and personal decisions. Procedures for a decision-making model include identifying a problem, defining the desired solution, identifying alternatives for accomplishing the desired outcomes, and selecting the best alternative. The hypothetical classroom situation which concludes the document involves applying decision-making procedures to the problem of storage of toxic chemicals near a school playground. (Author/CK)