This course provides students with fundamental concepts and approaches to the interaction between cognition and linguistic differences, with an emphasis on bilingual acquisition and processing. This course addresses questions related to how humans learn additional languages to their first languages. It will guide students through analysing and interpreting empirical data, and exploring the ways in which research informs practice. How theoretical and methodological developments have shaped current research in bilingualism will be surveyed. Students should view this course as an opportunity to identify questions related to language teaching in their future coursework and career.