Explains the three main concepts of the system dynamics approach to model building (dynamics, feedback, and systems) and the basic steps to problem solving by simulation applicable to all educational levels. Some DYNAMO commands are briefly described. (EAO)

"Big Business" is a series of computer simulations designed to give players a chance to compete in the practical world of business and finance. The basic elements of the simulations and versions designed for home use, middle school students, and high school students are described. (Author/JN)

"Lemonade" is one in a series of simulations designed to permit exploration of elementary concepts in economics. The nature of the simulation, problem-solving skills fostered, and suggestions for use of the program in the classroom are discussed. (Author/JN)

Discusses steps involved in model building and simulation: understanding a problem, building a model, and simulation. Includes a mathematical model (focusing on a problem dealing with influenza) written in the DYNAMO computer language, developed specifically for writing simulation models. (Author/JN)

Provides a detailed description of Lemonade, a business game designed to introduce elementary and secondary students to the basics of business; i.e., problem solving strategies, hypothesis formulation and testing, trend analysis, prediction, comparative analysis, and effects of such factors as advertising and climatic conditions on sales and…