The author suggests that we apply recent research knowledge to improve our conceptualization, measures, and methodology for studying the effects of teachers’ professional development on teachers and students. She makes the case that there is a research consensus to support the use of a set of core features and a common conceptual framework in professional development impact studies. She urges us to move away from automatic biases either for or against observation, interviews, or surveys in such studies. She argues that the use of a common conceptual framework would elevate the quality of professional development studies and subsequently the general understanding of how best to shape and implement teacher learning opportunities for the maximum benefit of both teachers and students.

This study uses a national probability sample of 1,027 mathematics and science teachers to provide the first large-scale empirical comparison of effects of different characteristics of professional development on teachers’ learning. Results, based on ordinary least squares regression, indicate three core features of professional development activities that have significant, positive effects on teachers’ self-reported increases in knowledge and skills and changes in classroom practice: (a) focus on content knowledge; (b) opportunities for active learning; and (c) coherence with other learning activities. It is primarily through these core features that the following structural features significantly affect teacher learning: (a) the form of the activity (e.g., workshop vs. study group); (b) collective participation of teachers from the same school, grade, or subject; and (c) the duration of the activity.

This article examines the effects of professional development on teachers’ instruction. Using a purposefully selected sample of about 207 teachers in 30 schools, in 10 districts in five states, we examine features of teachers’ professional development and its effects on changing teaching practice in mathematics and science from 1996–1999. We found that professional development focused on specific instructional practices increases teachers’ use of those practices in the classroom. Furthermore, we found that specific features, such as active learning opportunities, increase the effect of the professional development on teacher’s instruction.

Comprehensive school reform, or CSR, a currently a popular approach to school improvement, is intended to foster schoolwide change that affects all aspects of schooling (e.g., curriculum, instruction, organization, professional development, and parent involvement). Federal, state, and local legislation and funding have supported CSR implementation, and in 1997 Congress enacted the Comprehensive School Reform Demonstration program, which gives financial support to schools adopting such reforms. This article reviews and synthesizes the literature that documents CSR implementation, positing that the more specific, consistent, authoritative, powerful, and stable a policy is, the stronger its implementation will be. It finds that all five policy attributes contribute to implementation; in particular, specificity is related to implementation fidelity, power to immediate implementation effects, and consistency, authority, and stability to long-lasting change.

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