They were cleaning the stairwells of the school where more than 500 students walk up and down daily from 8 am to 3 pm.There is no reason to provide protective gloves if there is nothing to be protected from.
I can't help but think of all the filth on the ground from various areas of Philly. One would think that kind of cleaning should be left to the professionals and things like sweeping the hall and washing white boards and desks.