In this article, the authors argue the case for scientific evidenced-based practice in education. They consider what differentiates science from pseudoscience and what sources of information teachers typically regard as reliable. The What Works Clearinghouse is discussed with reference to certain limitations of its current operation. Given the…

In the No Child Left Behind Act and the What Works Clearinghouse, the federal government has attempted to establish guidelines for the type of education research that U.S. schools should consider in selecting instructional programs and resources. The government's clear preference for the medical model--a powerful research design in such fields as…

A solution to the problem of specification error due to excluded variables in statistical models of treatment effects in nonrandomized (nonequivalent) control group designs is presented. It involves longitudinal observation with at least two pretests. A maximum likelihood estimation program such as LISREL may provide reasonable estimates of…