This article examines language teachers’ attitudes towards use of the first language (L1) in second language (L2) learning and teaching from the perspective of teacher identity. Drawing on a theory of identity as both experiential and relational, in-depth interviews are used to explore the perspectives of six pre-service English language teachers in Hong Kong who had recent experiences of medium of instruction (MOI) policies and their implementation within Hong Kong secondary schools during an eight-week teaching practicum. The results suggest that MOI issues presented significant challenges to the participants as they struggled with multiple identities at the institutional, interpersonal, and intrapersonal levels. Implications for language teacher education, the formation and implementation of policies towards use of the L1 in L2 teaching and learning, and future research are discussed.
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