Drawing on findings from a national study of learning-focused leadership in challenging urban settings, this article examines the work of teacher leadership in urban high schools. In this context, a recently emerging cadre of nonsupervisory teacher leaders, working in collaboration with supervisory leaders, exercises a form of "distributed…

The retrospective case history is a little-used, but very valuable tool in organizational theory research. It is particularly useful in illuminating variables in an organization's development which, in controlled experimentation, would require prohibitively long periods of time to materialize. Additionally, the technique is useful for generating a…