**Abstract**

This paper is an inquiry into an action research process in which staff from a combined vocational and academic upper secondary school philosophized "The Dialogos Way" together, as part of ongoing curriculum reforms in Norway. Some teachers were also trained in facilitating such dialogs with their students. Since sustainable development is one of three interdisciplinary topics now supposed to run through all subjects at all educational levels, our chosen action inquiry research question in this paper reads as follows: How can training teachers in philosophizing the Dialogos Way promote attitudes and skills required for dialogic learning-and-teaching, and how can this form of learning-and-teaching support education for sustainable development? Using teachers' and students' meta-reflection notes as data, the authors find that the Dialogos approach offers a fruitful way of integrating sustainable development issues in the curriculum.

**Keywords:** dialogic learning-and-teaching, philosophical practice, sustainable development, philosophizing the Dialogos way, philosophical dialog, dialog facilitation, dialogical schooling
