This article introduces and discusses a study that aims at illuminating discursive representations of education for sustainable development (henceforth -- ESD) by means of compiling and analysing a corpus of policy documents written by English medium instruction (EMI) secondary schools in Estonia and Norway, respectively. Informed by the constructivist approach (Foucault, 1981), discursive representations of ESD in the study were operationalised as discursive strategies that were employed in naming, referring to, and providing an evaluative perspective to ESD-related topics. In this study, the corpus of policy documents published by EMI secondary schools in Estonia and Norway was collected in order to analyse discursive representations of ESD by means of applying a qualitative content analysis. The results of the analysis indicated that the discursive representations of ESD were similarly construed in policy documents written and communicated by EMI secondary schools in Estonia and Norway. Those findings were further discussed in the article in conjunction with their didactic implications.