> it should be noted that this policy started to be dismantled 4 years ago
Sure, if by started to be dismantled you mean "was completely unchanged other than they stopped assigning the thumb-twiddling teachers to big rooms/facilities (too visible a target to critics) in favor of assigning them to smaller spaces - spare cubes, broom closets, locker rooms, conference rooms - more widely distributed around the city and hence harder to count."
http://www.nydailynews.com/new-york/education/city-schools-r...