Simulation-Based Learning Environments include Management Flight Simulators, Microworlds, Interactive Learning Environments, and similar approaches. These learning environments have been developed in a number of areas such as business, health care, and education. The focus of this session will be on different ways of supporting learning with SD models by making those models and their lessons more accessible to users. This is typically done by allowing users to manipulate the models themselves through an interface, simulation game, guidance by well-designed didactic materials, or other means. Papers on three very different applications will be presented. One describes how didactic materials are used to guide students through explorations of market dynamics. The second presents an interface that enables health planners to examine different strategies for dealing with outbreaks of contagious diseases. The final paper describes an experiment in which some participants in a computer-based managerial microworld had access to an interface based on a balanced scorecard while other relied on information in traditional report formats. Discussion afterwards will explore common insights from these applications.