Due to their crucial role both in the construction of knowledge and the organization of classroom proceedings, Classroom questions are truly constitutive elements in the production of classroom interaction. Pairing the methodological power of conversation analysis with the conceptual framework of sociocultural theory, this book portrays in details of interaction how comprehension-check questions work in the reality of the language classroom. Drawing on a number of episodes from naturally-occurring classroom interactions, this book offers language teachers the opportunities to be aware of the details of their practice of checking comprehension and, as a result, take actions in light of the pedagogic goals at hand.