A system for the analysis of elementary school science teacher's guides and other program materials is described. The system, which can be used with either textbook-based or activity-based programs, produces a detailed step-by-step account of "What the classroom would be like if the teacher followed the recommendations in the teacher's guide literally." Each unit of activity is called a student task; student tasks are characterized with respect to a number of features, including suggested classroom organization, teacher and student activities, conceptual information content, and science process skills addressed. (Author/CS)