(main classroom) sound & video & courseware __( Share )-->> (sub classroom) campus net & Internet
(main classroom) explanation of courseware & background-writing & label from teacher
<<--( Interactive )-->>
(sub classroom) learn lesson info on screen, and could communicate with teacher through vidicon
(sub classroom) students apply to Q/A buy pressing a button, meanwhile, vidicon will track on this student.
(main classroom) teacher's screen will show the application with "yes" or "no", if permitted, video will switch to the speaker, after that it will go back the teacher's scene