This book explores the role of identity in adolescent foreign language learning to provide evidence that an identity-focused approach can make a difference to achievement in education. It uses both in-depth exploratory interviews with language learners and a cross-sectional survey to provide a unique glimpse into the identity dynamics that learners need to manage in their interaction with contradictory relational contexts (e.g. teacher vs. classmates; parents vs. friends), and that appear to impair their perceived competence and declared achievement in language learning. Furthermore, this...