Education for sustainability (EfS) is emerging as an urgent imperative and challenge for higher education. But what exactly does it mean to put sustainability into higher education? How do we bring sustainability themes into university curriculum, across the enormous diversity of academic disciplines? This paper describes the experience of teaching a large 'stand-alone' EfS subject which sits within the professional contexts of the large first-year cohort undertaking it. We describe the themes, architecture and approach to sustainability education taken in this course and evaluate the learning and assessment activities offered to students. We conclude with reflections on the student experience and feedback, which suggests that while academics build towards a deeply embedded sustainability ethic in higher education, specialist parallel courses have a valuable role to play in the transition to sustainable futures.