Although VRLEs (virtual reality learning environments) place the learner of a pedagogical situation in a virtual reality environment, they are dependent on a particular field or context and do not allow teachers to define or adapt their models of scenario. To help teachers in designing and generating VRLE adapted to their needs, we aim at defining a process for the design and production of VRLE and a scenario's model. We develop an editor allowing the specification of scenarios and pedagogical activities based on VR-oriented pedagogical objects.