The session will present the JENII project and its results in the form of immersive and interactive virtual environments. It will address both the technical and pedagogical aspects of integrating these new devices into a hybrid and complementary continuum. The session will illustrate this continuum through various application cases and will emphasize the main benefits of Virtual Reality and Digital Twins for increasing the capacities of both teaching (on the teacher's side) and learning (on the learner's side).