ABSTRACT Assumptions tend to shape in-struction. Nine assumptions concerning the study of cultures are presented in this article. The authors have presented a limited number of examples from Latin America to illustrate the propositions. These are: critical incidents; time; cultural heuristics; historical constraints; concepts of social stratification, conflict, change, and justice; subsuming elements of a culture; cross-cultural elements; space; and social structure and function. The focus is on day-to-day cultural and cross-cultural patterns vis-a-vis historical culture and civilization.