Don't mistake actor and writer François Bégaudeau's "The Class" (or "Entre les murs" in French) for "Head of the Class" or Mr. Kotter's cast of lovable TV misfits. No, in this film of François Bégaudeau's book -- directed by Laurence Cantet -- in which the author stars as a version of himself, Mr. Marin -- is a hard-edged look at daily life in a French classroom that reflects the changing face of the country.