This article argues for using discourse analysis in business and management curricula to increase language awareness. To that end, an ecolinguistic discourse analysis approach (Stibbe, 2015a) for teaching sustainability is proposed. The article first explores sustainability discourse in two chief executive officer letters to shareholders followed by a classroom implementation enabling students to practise discourse analytical skills. Students examined vocabulary, hedging, modals, abstract and concrete representation, and social actors. Linguistic features were interpreted to reveal communicators' underlying ideologies. This systematic analytical approach allows students to reflect on communication processes and how these processes can be used strategically when communicating in organizational contexts.