Sebastian goes to the very-recently-established Ross School; Camille attends Nightingale-Bamford; Jessie and PC attend the Dwight School; Kelli (whose parents live in the Hamptons and visit their teenagers in Manhattan one night a week) attends Birch-Wathen-Lenox, and Taylor goes to Stuyvesant, which is not a prep school but a magnet public school.

Gawker - New York City Rich Bravely Defend Themselves Against NYC Prep Kids - NYC Prep

and look!  only the public school kid is smart.  getting into stuy makes getting into harvard look like a cake walk.