Regression discontinuity (RD) designs are commonly used for program evaluation with continuous treatment assignment variables. But in practice, treatment assignment is frequently based on ordinal variables. In this study, we propose an RD design with an ordinal running variable to assess the effects of extended time accommodations (ETA) for…

The National Assessment of Educational Progress (NAEP) has been the subject of many evaluations during its history. Those evaluations are reviewed, focusing on external evaluations, and the influences of recommendations made in the evaluations are discussed. The report concludes that many of the recommendations of evaluators have been heeded by…

Rigorous research provides information that will allow other schools and districts to select interventions that have a scientifically based track record of effectiveness. All Striving Reader grants include the mandate to evaluate literacy intervention(s) targeted to adolescents who are reading significantly below grade level. Although all studies…

A review of the National Assessment of Educational Progress (NAEP), which originated 20 years ago, is presented; and the original political, ideological and social science assumptions for the design of NAEP are examined. The report criticizes the founding principle as hampering NAEP's maximum utility and exploratory power. In examining the form of…