'Bad Teacher' stars Ari Graynor as a selfish (but not sociopathic, as in the Cameron Diaz film) woman who lies to work in a school with children of rich divorced dads.Based on the 2011 Cameron Diaz film of the same name, "Bad Teacher" is something of a novelty on CBS, a single-camera comedy in a sea of old-fashioned multicamera, feel-the-hilarity sitcoms like "The Big Bang Theory," "Two Broke Girls" and "Mike & Molly." ("The Crazy Ones," whose time slot "Bad Teacher" will occupy, cracked that mold this season but did not break it.)