VRML-based environments can be used very effectively for teaching a variety of online courses. This paper describes the development of an Internet-based collaborative learning environment in which VRML is not only the means but also the subject of teaching. Such a VRML environment is designed to assist and support employees of the 'New Media' industries enrolled on short courses run by the Interactive Media Group in the School of Computing, University of Plymouth.This paper focuses on some key issues in the design of the VRML teaching environment and using it for real-time and on-demand course delivery. One of the most interesting issues is the experience of learning and teaching VRML while being within a VRML world. Such an immersive method of learning provides students with unique experiences and significantly increases the efficiency of the learning process.