This paper shows that in education and training systems LOM can be used to map the structure of courses. The necessary extension of the aggregation level is introduced. The description of the courses created with LOM allow for the reuse at all levels. Rhetoric didactic relations between the learning objects are also stored in the LOM records and support adaptivity. Our approach for the first time shows the suitability of using LOM together with a well defined knowledge base in order to create adaptive and modularized courses. In this paper an example application of the presented approach represents computer-based training.