Within an educational context, adaptation could improve the learning's quality. Many researches are done in the learning-situations adaptation field. The Educational Modeling Languages (EML) and tools provided currently to the teacher for a learning design, as preexistent means in our sense, remain useless by practitioners. In our work we aim to support the practitioner teacher to design and adapt his/her learning scenarios which are by nature open, influenced by the context in which they are executed. The approach adopted is the combination between Model-Driven Engineering (MDE) and Domain-Specific Modeling (DSM). In this paper we present a model of open learning scenario. So we take the learning scenarios of Hop3x as a case study.