The most commonly applied use complex and expensive means, such as electronic classrooms and high bitrate transmission systems. On the other hand, many courses available on Internet as well as correspondence distance courses are satisfied using a minimum infrastructure.
Virtual classroom proposes an intermediate tele-teaching form.
It is based on the public telecommunication networks and offers a large organization freedom to the participants. The students, geographically dispersed, communicate between themselves and their teachers by video telephony, mailing and electronic blackboard, documentation service and forum. Introduction Tele-teaching has already been experienced in many various forms. The most common consists of educational program broadcasting through videoconference chanels. The program is followed at fixed hours by a public gathered in distance classrooms.