The MOOCs are environments that permit a massive provision of mediatized contents. Despite the success of this phenomenon, the course drop out rate remains very high. In this paper, we want to address the issue of the attractiveness of these contents, because even though they are rich, the proposed resources are rarely complex. However, the provision of complex resources, allowing a practical experience, facilitates the acquisition of knowledge and the global attractiveness of MOOCs. Most of the TEL standards formalize pedagogical resources which can be complex in their structure but simple in their use. In this article, we propose a modeling of complex resources based on SOA to facilitate their integration in a MOOC platform. The proposed model has been tested in a MOOC platform (Claroline Connect) with two types of complex resources: a remote laboratory and a serious game