This paper introduces a variation on the post-test only cohort control design and addresses questions concerning both the methodological credibility and the practical utility of employing this design variation in evaluations of large-scale complex professional development programmes in mathematics education. The original design and design…

A study examined the impact of the "Closing the Achievement Gap" (CAG schools) program on the academic achievement of students in 30 schools serving high percentages of African American and economically disadvantaged students in West Virginia (WV), 2004-2008. The program assigned experienced educators, "CAG liaisons", to the…

Recent calls for improvements in the teaching of science gave rise to the implementation of numerous reform strategies in the elementary classroom. Although, they have not met with success in all content areas, professional development workshops have been shown to be effective in producing changes in teachers, the teaching process, and ultimately…

Past research has indicated that a number of problems in the teaching of science in elementary classrooms are rooted in the preparation of inservice teachers. One continuing concern is elementary teachers' lack of science content knowledge. As indicated by numerous research studies reporting positive results, one method of addressing these…