摘要:This paper describes the basic architecture and functional principles of a new instructional design system called InterMediActor (IMA) and reports about its implementation state. IMA provides an environment for instructional content design, production and reuse and for student evaluation that is based on the decomposition of the learning objectives in a hierarchical structure of competences. The process of content production and learning in competence-based systems is described and the main advantages and differences in relation to other proposals, like SCORM and EML, are discussed.