In this paper, we are mainly concerned with coherentism as an approach to ethical dialog in school. We have two different but connected aims with the paper. The first aim is to say something about general philosophical questions relating to coherentism as a theory in metaethics, and especially in relation to value education; the second aim is to explore some possible implications of coherentism as a method in studying the enterprise of discussing ethical issues and questions with children as well as the study of the actual ethical discussion in school. Furthermore, we evaluate the connection between a coherentistic approach to justification and the methodological parts of a Philosophy with Children, or Community of Inquiry, approach to ethics in school. Related to this, we scrutinize what implications this has for evaluating ethical learning within Philosophy with Children, or Community of Inquiry, as well as implications for evaluation of the Philosophy with Children, or Community of Inquiry, approaches as methods for dealing with ethical matters in school.