This book focuses on English as a Medium of Instruction practices in higher education in Vietnam, addressing institutional, practitioner and student perspectives. It presents theoretical standpoints and empirical experiences of how institutional policies are enacted in the offering of English as a Medium of Instruction programs in universities in Vietnam, and how the disciplinary content is taught and learned through English. The book showcases the enactment of curricular and pedagogical practices in the classroom, drawing on a range of different disciplines central to university education. It also explores the roles of mother tongues in the construction of disciplinary knowledge in English as a Medium of Instruction programs and courses. This book provides guidance and practical information for university English as a Medium of Instruction policy makers, lecturers and student support teams in English for academic purposes across disciplines, as well as to the theoretical framing of the English as a Medium of Instruction field itself.