This article describes a longitudinal ethnographic research project in a Grade 1 classroom enrolling L2 learners and Anglophones. Using a community-of-practice perspective rarely applied in L2 research, the author examines three classroom practices that she argues contribute to the construction of L2 learners as individuals and as such reinforce traditional second language acquisition perspectives. More importantly, they serve to differentiate participants from one another and contribute to community stratification. In a stratified community in which the terms of stratification become increasingly visible to all, some students become defined as deficient and are thus systematically excluded from just those practices in which they might otherwise appropriate identities and practices of growing competence and expertise.