Jeff Koons has entered the classroom at 65, signing on as an instructor for MasterClass. An art critic tuned in to glean some of the master’s magic.Jeff Koons has entered the classroom at 65, signing on as an instructor for MasterClass. An art critic tuned in to glean some of the master’s magic.Read MoreMasterClass (Yanka Industries Inc), Art, Sculpture, Koons, Jeff, E-Learning, Content Type: Service