This paper presents findings of case studies that applied social exchange theory to examine the instructional leadership roles of four exemplary high school department chairs. Data were gathered at four suburban high schools in a large metropolitan area of the midwestern United States using the methods of observation and interviews with the…

The ways in which principals have influenced or been influenced by four Teacher Corps projects are described and explained in case studies based on field interviews, observations, and a review of the documents produced in the course of the projects. The studies also provide the background both for an analysis of factors affecting the role of the…