My research interest focuses on education for sustainable development (ESD). The overall aim of my doctoral study will probably focus on how different collaboration situations between teachers from different disciplines, in secondary school, affect the individual teacher’s interpretation of ESD. The aim is to explore the importance of interdisciplinary discussions, meetings, exchange and collaboration between teachers as a way to reflect on their own view of ESD. From being a concern mainly within the natural sciences, environmental education is now expected to be of mutual interest for most subjects across the curriculum borders (Schnack, 2000). ESD seeks to integrate ecological, social and economic perspectives into environmental education. The aim of my first study is to investigate how a discussion at an interdisciplinary meeting between teachers in secondary school develops. Is there an opening of different perspectives when teachers from different disciplines discuss about sustainable development? In what way can this interchange give new perspectives? Research questions How do interdisciplinary meetings and collaborations between teachers influence the individual teacher’s interpretation of Education for Sustainable Development? Research questions of this study: • What aspects are emphasized by teachers in an interdisciplinary discussion about sustainable development? • What do different teachers consider as important aspects of the discussion?