Newest high school (as of 2009) in the Chesterfield region on Virginia. Rival School Clover Hill High School. cosby is a fairly nice school with of course drama. Has most of the same problems as Clover Hill students, only students at Cosby are all assumed to be angels. Lots of preps. But pleanty of cool, chill kids. Home of the Health Science Center. Overall Cosby is a great school, with tons of school spirit and great extra cirriculars.