Abstract: The learning content is the key factor of any online learning framework. The learning delivery content has to comply with specific electronic web technology. Three main case studies served as basis of research studies and development of such materials, all the case studies being presented within a PhD thesis. They are as follows: two Web-based collaborative environmental training course for online courses within the European projects and development of the course Simulation of Manufacturing Systems within the analytic program for postgraduate students "Conception Intégrée des Systemes Technologiques" – Faculty IMST – Politehnica University of Bucharest.