Peter I. De Costa is an Associate Professor in the Department of Linguistics, Languages, and Cultures and the Department of Teacher Education at Michigan State University, where he directs the Master’s in TESOL program. His research areas include emotions, identity, ideology and ethics in applied linguistics. In addition, his ecologically- and social justice-oriented work looks at the intersection between second language acquisition (SLA) and language policy. He is the co-editor of TESOL Quarterly and the second Vice-President of the American Association for Applied Linguistics.