PHILADELPHIA — A commotion of kids exits Mastery Charter School Mann Campus in Philadelphia at the end of the day.
Chirping and reenergized by the final bell, they join up with their adults in the schoolyard in animated family reunions, then head toward the street.
Off to the side, however, a small clutch of around 10 children who have left the building turn around and are escorted back in, swimming against the tide of homebound classmates.
