Jerusalem College of Technology (JCT) is a multi-campus institution with identical syllabi for courses in every campus. Moreover, learning at JCT requires at the same time synchronous and asynchronous learning and teaching. For some introductory courses in Mathematics for Engineering students, websites have been built and now upgraded in order to fit the requirements due to multiple campuses. The original triple function model "homepage-tutorial-mailing list" had to be modified in various directions, in order to fit the students' needs and the central role of the course coordinator. We discuss here the structure and management of the websites and the contribution of these supplementary materials towards teaching efficiency and towards students' better learning skills. (Contains 2 figures.)