The present study examines data collected during the second year of a three-year longitudinal cluster randomized controlled trial, the Responsive Classroom Efficacy Study (RCES). In the context of and RCT, the research questions address naturally occurring variability in the independent variables of interest (i.e., teachers' (fidelity of…

Using data from an urban public pre-k program, the authors add to and extend the emerging evidence base of the effects of public prekindergarten programs on child school readiness. They also use data collected in treatment classrooms to examine associations between teacher characteristics, fidelity-to-curricula, dosage and child outcomes. Their…

This study focuses on how the treatment effects of a teacher professional development initiative in science differed by school capacity. In other words, the authors are primarily concerned with treatment effect heterogeneity. As such, this paper complements ongoing evaluation of the average treatment effects of the initiative over time. The…