Constructivism and constructionism are two distinct epistemologies. Yet, within religious education many have tended to use these terms interchangeably or as being complementary to one another. This article provides conceptual clarity in relation to both epistemologies by comparing each in terms of their origins and epistemological premises, their ontologies, and their respective purposes. It concludes by articulating some implications concerning the use of each to contribute to research in the field of religious education.