In this article we argue that culturally variable values and morals have a key role in educational initiatives that address a global dimension. The article suggests that looking at values and morals in relation to a teaching practice is a way of adding knowledge to this field. Our study inquires into how an intercultural experience can evoke ethical reflections on environmental and sustainability issues. The article is based on a qualitative empirical study of teachers' experiences of a teacher development programme, where we analyse the variety of ethical reflections that emerge during a study visit to a Central American country. We build on a pragmatic analytical approach that takes John Dewey's ethical thoughts on moral situations as a point of departure and deals with teachers' ethical reflections in a way that takes the contextual and situated nature of morals into account.