Going to class is a major part of being a classical musician. But have you heard of a "master class"? One student at a time gets up and performs a piece in front of a class, and then the "master" leading the class critiques said performance. Sounds nerve-wracking (read: ...like the stuff of nightmares) to us. Gather 'round for this special assembly in which Classroom's first substitute teacher, Maggie Molloy, talks to Maestro Itzhak Perlman about the history and importance of the master class, and how his new addition to the MasterClass online series makes it possible for even those of us not attending conservatory to take a class from him.