Describes the process by which Learner Verification and Revision (LVR) transforms information gathered during learner verification into revision prescriptions for the development of instructional materials. Robinson's and Gropper's procedural models for formative evaluation are also discussed and a study comparing the effectiveness of materials…

A study was conducted to explore some of the relationships existing between the early behavior of a change agent with a group client system and its subsequent effects on the helping relationship established between them. A review of related literature was made. The model of helping relationship which formed the basis for the design of the study…

To examine the problem of widening gaps in reading achievement between initially low-achieving children and other students as they move through elementary school, the authors first reviewed the literature on school effectiveness. Using a form of systems analysis called "system dynamics," they formulated a model and a set of hypotheses…