Efficacy studies of educational programs often involve mediator analyses aimed at testing empirically appropriate theories of action. In particular, in the studies of professional teacher development programs, the intervention targets presumably teacher performance while the ultimate outcome is the student achievement measured by a standardized…

Empirical Education Inc. conducted a quasi-experiment investigating the impact of the Alabama Math, Science, Technology Initiative (AMSTI) training. The study compared classes of fully-trained AMSTI teachers to classes taught by teachers with no AMSTI training within the same schools. The outcome measure was the ACT Aspire in math, science, and…

In October 2010, WestEd's Strategic Literacy Initiative (SLI) won an i3 "Validation" grant to scale up and validate the Reading Apprenticeship (RA) model in three core secondary content area classes: U.S. history, biology, and English language arts. SLI's proposal stated two goals. Goal 1: To transform academic literacy teaching and…

The purpose of the current work is to apply several main principles of the causal explanatory approach for establishing external validity to the experimental arena. By spanning the paradigm of the experimental approach and the school of program evaluation founded by Lee Cronbach and colleagues, the authors address the question of how research…

The authors were asked to find out whether "On Our Way to English" ("OWE"), a supplementary, text-based product to help elementary school students learn to read and speak English was more effective in a California and a Texas school district than the materials the districts already had in place. They conducted an experiment…