In the morning sun, herds of elementary school students file clumsily off yellow buses and spring from family cars by the dozens. Their pace is brisk. Ranks close as the scattered masses press through traffic cones positioned to drive 1,750 youngsters to class without a stampede. A band of Jackson Elementary School faculty stands by ready to round up stragglers, to slow the rush of latecomers, to keep the peewees in the pack from getting shoved along or falling underfoot.