Evaluators use their eyes to see what is there, whether it is intended or not. But they use their test instruments to measure what is intended, whether it is there or not. Evaluators have been broadening their repertoire of instruments for years: curriculum-embedded tests, observer checklists, audiotape recorders, videotape recorders, unobtrusive…

The purpose of this study is to compare the teacher retention rates in public elementary and middle schools in Georgia that met or did not meet the academic performance component of Adequate Yearly Progress. The teacher retention rates were expected to be higher in schools that met the academic performance component of AYP and lower in the schools…

The gold standard in making causal inference on program effects is a randomized trial. Most randomization designs in education randomize classrooms or schools rather than individual students. Such "clustered randomization" designs have one principal drawback: They tend to have limited statistical power or precision. This study aims to…