Internationally, there has been increasing emphasis on the teaching of the academic literacies, particularly reading and writing, in higher education institutions. However, recent research is highlighting the need for more explicit teaching of multimodal forms of communication, such as the visual literacies, in undergraduate courses in a wide range of disciplines such as the sciences, engineering and architecture. The research recognises that this is an area of academic literacy teaching that has often been neglected. This article draws on the findings of a research project which set out to understand both the multimodal literacy requirements and current practices in the teaching of these literacies in the earth and life sciences at a South African university. Three key themes are discussed: learning to see like a scientist, the importance of learning by switching between and integrating different modes of representation and teaching the conventions of representation in the sciences. The conclusion proposes ways for academic developers to work with staff to develop more explicit ways of teaching the visual literacies.