Do you mind me asking (if it's not too personal), why you chose to teach in the inner city?
I'll take the liberty to answer on behalf of wizard. In LA most of the openings for new hires are for the inner-city. These recruits generally stay for as long as it takes to find another district or another line of work. At these little fortresses there is no support from the administration or parents in dealing with unruly kids. The enironment is as bad as it gets. Wizard probably understated the situation he faces.
It's a long story.