Chapter 6 Pedagogical Content Knowledge: Twenty-Five Years Later

This chapter briefly reviews the research related to the construct of pedagogical content knowledge (PCK) over the past 25 years. Despite the remarkable implications of the PCK conceptualization, questions remain concerning the vagueness of the construct and the studies conducted on the PCK research line, questions which may lead to new developments in defining the nature of the conceptualization, its validity, and its utility. However, agreement exists concerning the need to portray specific cases of PCK of successful teaching. The work argues for a need to develop models of teacher learning and professional development that are subject matter specific. The chapter ends with a call for basing professional development on the conceptualization of PCK.