A broad range of well-structured problems--embracing forms of diagnosis, catalog selection, and skeletal planning--are solved in expert computer systems by the method of heuristic classification. These programs have a characteristic inference structure that systematically relates data to a pre-enumerated set of solutions by abstraction, heuristic…

Described is how the computer was used in an environmental education module to develop students' decision-making skills and the concepts of probability. The computer was also used to analyze the presence of lead in the environment. (KR)