One of the primary teaching tasks of an elementary school social studies teacher is that of helping pupils interpret the numerous sources of data found in a social studies program. The purpose of this self-instructional teacher education module is to develop proficiency in utilizing data interpretation process. A sequence of activities is designed to develop teacher competency in using a process model to guide pupils in the interpretation of data. The model outlines teaching strategies which move from a series of concrete, specific encounters with factual data to a higher cognitive level which requires a conclusion or generalization that can be supported by the data. Questioning techniques used to convey specific thinking tasks to pupils are discussed. In Part II a model for analysis of the data source of still pictures is used and activities related to picture analysis are included. Appendices contain in-depth analyses of two commercial photographs. Related modules are SO 005 443 and SO 005 444, and SO 005 446 through SO 005 450. (SHM)