A telephone number airs before each lecture begins. Students use this phone number to phone into the classroom with questions during the lecture. A smaller number of courses are delayed broadcast at a day or time when the class is not meeting. There are also rebroadcasts of selected courses that air on a previous day or time. In either case, students typically communicate with the course instructor by email.
Corporate sites are open to employees only .
Public sites are open to any IIT student. When registering for televised courses the student selects a viewing site that is both convenient and open to the student. Therefore, it is critical that students carefully select the correct site when registering and officially change registration to a new site when appropriate.