Copyright 2009 John Filo / CBS

The 12 strangers moving into the "Big Brother" house are being cast into roles that will flash them back to high school. They will be playing the game as one of four familiar high-school cliques: popular, athlete, brainiac or misfit, and they have to compete for their food, safety from eviction and luxury prizes as part of their clique.

"You may have graduated, but the truth is we never leave high school and this summer we are going to prove it," says Allison Grodner, executive producer of "Big Brother."