Contemporary researchers have analysed dialogue primarily in terms of instruction, conversation or inquiry. There is an irreducible tension when the terms dialogue and instruction are brought together, because the former implies an emergent process of give-and-take, whereas the latter implies a sequence of predetermined moves. It is argued that effective teachers have learned how to perform in this contradictory space to both follow and lead, to be both responsive and directive, to require both independence and receptiveness from learners. Instructional dialogue, therefore, is an artful...