This study uses a sample of 454 teachers engaged in an inquiry science program to examine the effects of different characteristics of professional development on teachers’ knowledge and their ability to implement the program. The authors analyzed results from a survey of teachers served by 28 professional development providers within a hierarchical linear modeling framework. Consistent with findings from earlier studies of effective professional development, this study points to the significance of teachers’ perceptions about how coherent their professional development experiences were for teacher learning and program implementation. The authors also found that the incorporation of time for teachers to plan for implementation and provision of technical support were significant for promoting program implementation in the program.

This article describes elements of an approach to research and development called design-based implementation research. The

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Considerable effort has been made over the past decade to address the needs of learners in large urban districts through scaleable reform initiatives. We examine the effects of a multifaceted scaling reform that focuses on supporting standards based science teaching in urban middle schools. The effort was one component of a systemic reform effort in the Detroit Public Schools, and was centered on highly specified and developed project-based inquiry science units supported by aligned professional development and learning technologies. Two cohorts of 7th and 8th graders that participated in the project units are compared with the remainder of the district population, using results from the highstakes state standardized test in science. Both the initial and scaled up cohorts show increases in science content understanding and process skills over their peers, and significantly higher pass rates on the statewide test. The relative gains occur up to a year and a half after participation in the curriculum, and show little attenuation with in the second cohort when scaling occurred and the number of teachers involved increased. The effect of participation in units at different grade levels is independent and cumulative, with higher levels of participation associated with similarly higher achievement scores. Examination of results by gender reveals that the curriculum effort succeeds in reducing the gender gap in achievement experienced by urban African-American boys. These findings demonstrate that standards-based, inquiry science curriculum can lead to standardized achievement test gains in historically underserved urban students, when the curriculum is highly specified, developed, and aligned with professional development and administrative support. ß 2008 Wiley Periodicals, Inc. J Res Sci Teach 45: [922][923][924][925][926][927][928][929][930][931][932][933][934][935][936][937][938][939] 2008

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