" So, do you expect principals to sit around after they get home from work and watch their teachers teach in order to identify these "practices"? "
You're right. Principals couldn't view them during the day. No webcam necessary.
" How did your teachers and mine ever teach us successfully without webcams? "
Increased bureaucracy, political activism in the curriculum and activist teachers union's couldn't have changed the playing field. You're right, no webcam necessary.
" Parents can get involved by coming to school now and then-- to volunteer and to come sit in the classroom. "
You're right. Driving to the classroom's just as attractive as logging in on their computer, and nothing changes when a parent's in the room. No webcam necessary.
" Actually, we do just fine recording bad student behavior without having cameras on students all day everywhere."
You're right. You're doing a "fine" job at recording bad behavior.