Programs that improve teaching effectiveness represent a core strategy to improve student educational outcomes and close student achievement gaps. This article compiles empirical values of intraclass correlations for designing effective and efficient experimental studies evaluating the effects of these programs. The Early Childhood Longitudinal…

The current literature is replete with instances of imprecise and conflicting usage of "qualitative" and "quantitative" evaluation. This paper presents a framework for making distinctions among several related concepts to eliminate this potential source of confusion. In the process, the terms "qualitative" and…

Problems that face evaluators, including field based evaluations, are discussed. The author states that open communication, access to data, and an ability to be accepted are paramount; knowledge of randomness, robustness and homoscedasticity may be secondary. (Author/PN)