The purpose of the study was to identify external and internal influences that affected the decision making of four secondary teachers regarding the content of a family living course and to describe their decision-making strategies. Because the course had been shortened and a new textbook and new state guidelines had been received, the teachers had to revise the local curriculum guide. Methodology included observation, interviews, and document collection. The most important influences found to affect teacher decisions were curriculum resources, teacher repertoire and values, and student interests and needs. Two content selection strategies were identified: (1) curriculum by repertoire, i.e., the three teachers who had recently taught the course followed their repertoire from the past with only minor changes; and (2) curriculum by authoritative resource, i.e., the one teacher who had not recently taught the course relied heavily upon the textbook. Findings show that teachers rely heavily on curriculum resources during repertoire formation. Therefore, supervisors should carefully oversee the selection of those materials. Also, since repertoire serves as a limiting factor in teachers' future content decisions, supervisors should direct special attention to guiding teachers during their initial teaching experience with a course. (RM)