There are plenty of places where kids in school do not have constitutional protection. (Lockers can be searched for example.) Would you have kids in school receive the full protection of the bill of rights? (I failed because I was not given due process the kid told his lawyer.) Same with employeers, locked desks can be opened and searched at the employers whim.
There has never been a time when school kids have been left alone and not monitored, its just that in the past the staff of the school organized the monitoring. (And don't think the school did not know who was out behind the backstop having an illicit smoke?) Crimes in school are often not solved, too many thieves, no one was looking? The objection in this case must be related to the technology? Or would most Freepers prefer to see the schools a little more chaotic?
And before I get flamed, I am opposed to letting the government track our comings and goings as much as anyone, but in school as a parent, I expect my kid is where he is supposed to be at all times, if he is not and the school catches him, this will be the least of his troubles. I guess I am also sorry that the human element has vanished as the teachers got more control over their assignments and the union got more control over the administrators.