Agreement has become widespread that students' peer-to-peer argumentation should play a central role in science classrooms. Coordinating evidence with claims lies at the heart of a skilled argument. Yet evidence takes numerous forms that pose different interpretational challenges. Might cognitive limitations on the part of the individual student…

The construct of metacognition appears in an ever increasing number and range of contexts in educational, developmental, and cognitive psychology. Can it retain its status as a useful construct in the face of such diverse application? Or is it merely an umbrella term for diverse mental phenomena that are loosely if at all connected? Here I argue…