I do not think it is as simple as you put it; there are situations in urban public schools where student behavior would be beyond the control any teacher or any single person really.
That being said I love your point about not blaming an invsibile system. Every teacher I talk to blames someone else for all the problems in his or her clasroom. The public school system in this country is far from perfect but I believe many of the problems brought up in the original article arise from teachers who are unwilling or unable handle their students appropriately. Stop blaming everyone else and start solving the problem on your own.
That being said I love your point about not blaming an invsibile system. Every teacher I talk to blames someone else for all the problems in his or her clasroom. The public school system in this country is far from perfect but I believe many of the problems brought up in the original article arise from teachers who are unwilling or unable handle their students appropriately. Stop blaming everyone else and start solving the problem on your own.