In this article, we examine classroom observations from a 3-year large-scale randomized trial in the Los Angeles Unified School District (LAUSD) to investigate the extent to which a professional development initiative in inquiry science influenced teaching practices in in 4th and 5th grade classrooms in 73 schools. During the course of the study,…

The methodology associated with the California Study of Elementary Mathematics is examined. The article includes an overview of state policy and a description of participants and data collection procedures at the state, school district, school, and classroom levels, including methods used to collect data for development of case studies. (TJH)

Data collected at three schools in California with programs for students of limited English proficiency (LEP) suggests that exit rates should not be the focus of evaluations of LEP programs and that schools cannot adequately answer questions about students' academic achievement and English language acquisition by program type. (SLD)