Participant observation is a research and evaluation strategy in dealing with complex educational settings, organizations, and curricula is explored. Three alternative models are presented. The first is a general structural model involving three research strategies: an experimental design with pretests and posttests; a social survey with interviews and questionnaires; and, a participant observer study of the program. Second, a sequential model which attempts to cumulate efforts over time rather than concurrently in time. This model is illustrated in some detail by use of a study on teacher awareness. The third strategy of participant observation and curriculum evaluation is the cumulation of case studies. Substrategies under this model are suggested. (LR)