Improving the quality of teachers in schools is a keystone to educational improvement. New and veteran teachers alike need to enhance their content knowledge and pedagogical skills, but they must also examine, and often change, their underlying attitudes, beliefs, and values about the nature of knowledge and the abilities of students. Best accomplished collectively rather than individually, the interactions between teachers as they undertake the process of collaborative inquiry create "communities of practice."
This dissertation investigates the importance of science and mathematics teachers' participation in communities of practice to their professional capabilities. The study tests the hypothesis that the social learning inherent in community of practice participation encourages teachers to learn from others with expertise, enhances teachers' sense of competence, and increases the likelihood that teachers' will use student-centered, problem-based instructional techniques aligned with national disciplinary standards.
The researcher conceptualizes communities of practice along two dimensions that affect social learning: legitimate participation in activities and span of engagement with school members. Differences in teachers' subject area and the curricular track of their teaching assignment contribute to variation in teachers' participation in communities of practice along those dimensions. Using data from the National Educational Longitudinal Study, first and second follow-up, the study has two stages of multi-level analysis. The first stage examines factors that contribute to teachers' participation in communities of practice, including teachers' social and professional characteristics and school demographic and organizational characteristics. The second stage investigates the professional impact of such participation on the three outcome variables: teacher learning, teacher competence, and use of standards-based pedagogy.
Hierarchical linear models provide evidence that teachers' participation in communities of practice significantly increases teacher learning, competence, and use of student-centered techniques. For two dependent variables, communities of practice and standards-based pedagogy, the analyses include significant interactions for subject and curricular track. Findings from the study suggest that communities of practice serve both an adaptability and a stability function. Even as the social learning inherent in communities of practice enables teachers to gain knowledge, modify beliefs, and change instructional practice, it also results in normative pressure to maintain institutionalized approaches to instruction.