Students must have uninterrupted periods of time to process information, to reflect on what has been said, observed, or done, and to consider what their personal responses will be. After at least three seconds of uninterrupted silence, a significant number of positive outcomes occur for students and teachers. Students are more effective in…

Over the last 15 years or so, research into measurement error has begun to consider not just whether the test items fit, but whether the people who answer the items fit. Attempts to systematically identify people who do not fit the typical pattern have led to several "person-fit statistics." This digest describes the need for such…