This is the soundtrack of the presentation “How Bilingualism Informs Language Teaching” at the Japan Association for Language Teaching JALT 2012 International Conference, including a Q&A session concerning bilingual child-raising and use of the students’ native language in teaching. ABSTRACT: The discipline of bilingualism in applied linguistics is the study of languages in contact. This presentation introduces ways that bilingualism sheds light on language teaching. Bilingualism is shown to constitute the goal of language learning. It extends to identity issues, such as the option of biculturalism. It clarifies issues including effectiveness of language teaching approaches, the viewpoint of students, bilingual development at different ages, the societal context of language teaching, and language acquisition.