These precautions are taken because there are no aides in the remote classrooms. The teacher is responsible for all students in the class including those at the remote sites. The ability to videotape at any time aids the teacher in effectively managing an IDL class from miles away. Students taking an IDL class must be aware that their behavior can be taped at any time. Two-way interactive system allows students and teachers at remote school sites to see and hear one another simultaneously.
Fiber optics are capable of transmitting many interactive video channels simultaneously.
Hybrid System - uses any combination of the above technologies to create an interactive network. The advantages of two-way interactive television are as unique and individual as the schools using the systems. These courses are typically available in larger schools. Teachers are able to grow professionally and often are able to retain or expand their jobs with the schools, teaching the subjects that interest and excite them. The quality of the course work is assured by the teachers.