Another is focused on the students and a third camera zooms in on visual materials or demonstrations on the teacher's desk. The teacher selects the signal to send by using a push button switcher. Microphones pick up the students' and teachers' voices from anywhere in the classroom. Class materials are sent via facsimile, courier or U.S. Mail. The classroom diagram below depicts a typical ITV classroom design.
Actual classrooms are all custom designed.
The number and arrangement of monitors and student seating may vary.