We think that primary school teachers can be trained to help children mourn the loss of fellow classmates. This does not imply that teachers should assume the function of psychologists, nurses, priests or social workers. Teachers are already weighted by classroom duties and it cannot be expected that they become specialists of mourning. However, when a grave accident or death occurs among one of the pupils, the teacher is more likely to observe the first reactions to loss among them. In this article, we present useful information to the teacher desiring to understand mourning among children, and some reflections on ways of assisting.