To a large extent, the quality of classroom communication hinges on the teacher's ability to tune in and respond to emerging students' voices, which requires the astuteness and agility to hear layered messages, offer tailored assistance, and follow students' leads. It requires responding to multiple contingencies in real time. One important…

This article reports on the construction process of inclusion/exclusion for high school chemistry students in two schools in Belo Horizonte, the capital of Minas Gerais State, Brazil. We examined the interactional accomplishment of inclusion/exclusion of four students, two from a private school and two from a public school. The aim of this article…