When teaching larger classes, an online environment can provide many opportunities for increased student engagement, group work and self testing. In this case study Professor Alan Crosky, from The University of New South Wales, explains how he uses a blended learning approach in his Engineering Materials and Chemistry class with 700 first year students. He highlights the importance of providing student orientation and support when first introducing an online component, and discusses the benefits of integrating online tutorials and resources, group work, peer assessment and self-testing into the class.