What is "schoolkids"

Usage examples of "schoolkids".

She carried on past the kiosks and rest rooms, maneuvering through the schoolkids, who were now waiting for one of their teachers to sort his shit out with the tickets.

And if, already, some of the millions of schoolkids and adults labeled with ADD--Attention Deficit Disorder--and, put on drugs such as Ritalin, were starting to develop a Tourette-like syndrome, with facial tics and twitches that might be irreversible?

When I asked the old geezers about her, they sniggered like schoolkids.