Reuse and share of learning objects are an important issue. We noticed that the learning object enriched by its Metadata is not sufficient for an easy reuse and most of the time their granularity is not enough thin. We try in this paper to insist on the importance of the context as well as the granularity for a best reuse. We will present a Semantic Learning Model (SLM) facilitating the reusability of learning objects according to a pedagogical context. Our main contribution in this paper is the explanation of the decomposition process of pedagogical entities using an authoring tool called PHOENIX.