GALESBURG, Ill. - Caisha Gayles graduated with honors last month, but she is still waiting for her diploma. The reason: the whoops of joy from the audience as she crossed the stage. Gayles was one of five students denied diplomas from the lone public high school in Galesburg after enthusiastic friends or family members cheered for them during commencement. About a month before the May 27 ceremony, Galesburg High students and their parents had to sign a contract promising to act in dignified way. Violators were warned they could be denied their diplomas and barred from the after-graduation party. Many...