How do classroom exchanges shape the developing forms and functions of literacy learning and teaching as students transition across the years of schooling? We explore this question using excerpts from literacy lessons from primary and secondary classrooms, showing how lesson exchanges develop as trajectories connecting different forms of 'knowing'…

The focus of this special edition is students' literacy development over the school years. Drawing on data that includes classroom interactions, analyses of texts, and interviews with students, this edition builds on the seminal treatment of the question of literacy transitions provided in Christie and Derewianka (2008). This paper aims to…