This paper marks the second in a series of five reports detailing the work of the Optimizing Assessment for All (OAA) project at Brookings to strengthen education systems capacity to integrate 21st century skills into teaching and learning, using assessment as a lever for changing classroom practices. Twenty-first century skills (21CS) are now…

Despite policy efforts to encourage multiple measures of performance in newly developing teacher evaluation systems, practical constraints often result in evaluations based predominantly on formal classroom observations. Yet there is limited knowledge of how these observational measures relate to student achievement. This article leverages the…

Researchers in the areas of psychology and education strive to understand the intersections among validity, educational measurement, and cognitive theory. Guided by a mixed model conceptual framework, this study investigates how respondents' opinions inform the validation argument. Validity evidence for a science assessment was collected through…