This report is intended to provide a history of the development and evaluation of a set of training materials. The goal of this unit is to help school staff develop an understanding of the knowledge and skills necessary to identify, collect, organize, and analyze information useful in making decisions about program modification. The unit deals with the following topics: (1) identifying decisions to be made about program modification, and specifying who makes these decisions; (2) identifying alternative courses of action for decisions in the instructional management area; (3) determining what information is relevant to modification decisions; (4) taking responsibility for or contributing to a plan for program modification information; and (5) analyzing and reporting information. Described in this report are the parts of the unit, the program of development, testing, and field tests. A review of the unit by two specialists is summarized. (Author/MLF)