Guided by positioning theory and poststructural views of second language learning, the two descriptive case studies presented in this article explored the links between social positioning and the language learning experiences of two talkative students in an academic ESL classroom. Focusing on the macro- and micro-level contexts of communication, the article describes how one of the two talkative students became an accepted member of the class whereas the other one was excluded. Qualitative data and classroom talk were analyzed recursively. The findings suggest that social positioning has implications for developing useful classroom interactions that benefit all learners.