Why this article is worth discussing: A lot of us would wholeheartedly agree that active learning works. We have some familiarity with the research that supports it, and we’ve seen its positive effects in our classrooms. Done well, it engages students and overcomes the passivity that lectures regularly produce. John Dewey was right; students learn by doing better than by listening. So, we think we know the answer to the question, but this article challenges that assumption. It explores definitions of active learning, its intensity, how it’s delivered, and how its effects are assessed. It’s predicated on the assumption that we don’t know as much about active learning as we need to know. That’s the reason it’s an article worth discussing.