The population for which this instructional program has been found to be effective includes preservice and inservice elementary teachers who teach science. At the end of this instructional module, the participants should be able to: (1) given a set of data and a set of statements about the data, distinguish between those statements of fact and those of interpretation; (2) construct a systematic analysis of an event when given a set of data about that event; (3) state a question which can serve as a basis of further investigation and describe a plan for investigating that question. This module serves as an overview of those modules dealing with complex thinking behavior: "Meaning of Data", "Formulating Hypotheses", "Defining Operationally". The instructional component of the modules consists of: pre-appraisal, instructional activities, and post-appraisal. Other components are: objectives, rationale, references, materials list, and duplicated materials. The estimated time period required for this instructional module includes three hours for planning and 100 minutes for teaching. (BR)