Uearning for Sustainability (UfS), as conceived by Education Scotland and the General Teaching Council for Scotland (GTCS), spans all curricular areas and it is positioned as the responsibility of all - teachers, learners and educational leaders (Scottish Government 2016). Yet, such comprehensiveness has the potential to render the term and its purpose equivocal and perfunctory. Our experience working with teachers in this area suggests that the concept and term 'Uearning for Sustainability' are not widely understood, leading teachers to raise questions about the relevance of UfS policy in relation to their everyday professional practice. Beginning from this position our paper explores the tension between the policy vision and the professional reality. We follow three lines of enquiry: first, we outline the existing policy architecture in Scotland; second, we examine the basic understanding of the terminology and conceptual understanding of UfS across Scotland through a recent study conducted by Kirk (2017); third, we review a professional learning programme we have developed and deployed across Scotland. We suggest four key areas for change that would support the enactment of UfS within Scottish schools and so realise some of the potential the UfS agenda affords - namely, high quality professional learning, motivated staff working with others, interdisciplinary learning tailored to the needs of the students, and leadership within a clear strategic framework. We conclude with a note of caution, that although there is evidence that UfS can have a positive impact on attainment, helping learners to strive towards 'sustainable futures' is too important to be reduced to the current narrow national focus on attainment outcomes.