Teacher evaluation systems often include classroom observations in which raters use rating scales to evaluate teachers' effectiveness. Recently, researchers have promoted the use of multifaceted approaches to investigating reliability using Generalizability theory, instead of rater reliability statistics. Generalizability theory allows analysts to…

The authors argue for a reconceptualization of rigor that requires sustained, direct, and systematic documentation of what takes place inside programs to document how students and teachers change and adapt interventions in interactions with each other in relation to their dynamic local contexts. Building on promising new programs at the Institute…

In recent years, interest has grown in using classroom observation as a means to several ends, including teacher development, teacher evaluation, and impact evaluation of classroom-based interventions. Although education practitioners and researchers have developed numerous observational instruments for these purposes, many developers fail to…

The testing of English language learners (ELLs) is, to a large extent, a random process because of poor implementation and factors that are uncertain or beyond control. Yet current testing practices and policies appear to be based on deterministic views of language and linguistic groups and erroneous assumptions about the capacity of assessment…

In education research, a polar distinction is frequently made to describe and produce different kinds of research: "quantitative" versus "qualitative." In this article, the authors argue against that polarization and the associated polarization of the "subjective" and the "objective," and they question the attribution of generalizability to only…

Increasing emphasis on assessment and concern about assessment techniques have stirred interest in alternative assessment forms, for which evidence is needed about consequences, transfer of performance on specific assessment tests, and assessment fairness. Criteria concerning consequences, fairness, transfer-generalizability, cognitive complexity,…