Suffer the Little Children (2006)

Miss Sidley, an experienced, no-nonsense teacher starts to lose her bearings when she suspects one of her students, Robert, is not quite human. In a momentary reflection in her eyeglasses she thinks she may have seen Robert changing into a monster. She soon discovers that not only does Robert change, but he may not be the only one of his kind. Sidley must get rid of them before it's too late.

Horror