SUBMITTED BY:Judith Singer, James Bryant Conant Professor of EducationWHAT YOU TRIED:I always get to the classroom just as the previous class is ending and the first thing I do — before anything else — is play music through the speakers (often trying to link the music to the class theme, a la NPR). When I'm ready to start, I cut the music and everyone knows that class is beginning.BENEFITS:It's a great — and inoffensive — way of getting the class started quickly on time.