When students are talking with each other about content, most of us worry, at least a little bit. We’ve all heard less-than-impressive exchanges. For example, four students are in a group discussing three open-ended questions about two challenging readings. It’s less than five minutes since they started, but they’re already on question three. Or, they’re working with clickers, supposedly exchanging ideas about a problem, but the group has already decided on one member’s solution. She just happens to be a student who regularly answers in class and is almost always right.