I don't know a single teacher who doesn't try to use questions to encourage student interaction. The problem is that most of us don't spend a whole of time thinking about the kinds of questions we're asking students, how or why we're doing it, and whether there might be some things that we could do that would encourage more student interaction.
Since this is a piece about questions, I'm hoping you'd expect me to pose some. Let’s start with this one: What kinds of questions are students asking in your classrooms or online? Are they provocative and stimulating queries driven by intellectual curiosity? Or are their questions more pedantic than provocative—how many words you want on a reaction paper, or how many of the homework problems they need to do, or whether there’ll be multiple-choice questions on the test?
Yes, those kinds questions are important to students, but they aren't the kind of questions that we'd like to have students asking us. We need to ask ourselves why students ask these not very inspired questions. Lately I’ve been wondering if it’s related to the kinds of questions we’re asking them. How often do we ask them provocative, stimulating questions?