With dialogue and dialogic teaching as upcoming buzz-words, we face a familiar mix of danger and opportunity. The opportunity is to transform classroom talk, increase pupil engagement, and lift literacy standards from their current plateau. The danger is that a powerful idea will be jargonised before it is even understood, let alone implemented, and that practice claiming to be dialogic will be little more than re-branded chalk and talk or ill-focused discussion. Dialogic teaching is about more than applying tips such as less hands-up bidding. It demands changes - in the handling of classroom space and time; in the balance of talk, reading and writing; in the relationship between speaker and listener; and in the content and dynamics of talk itself.