The learning object remains an ill-defined concept, despite numerous and extensive discussion in the literature. This paper attempts to address this problem by providing a classification that potentially brings together various perspectives of what a learning object may be. Six unique types of learning objects are proposed and discussed: presentation, practice, simulation, conceptual models, information and contextual representation objects. The common characteristics of each are synthesized in a proposal that a learning object is best described as a representation designed to afford uses in different educational contexts. The classification of learning objects proposed could be useful as a framework for designers of digital resources and for those engaged in use of these resources in educational contexts.