JACKSON TOBY would let teenagers determine for themselves when they have had enough formal education [”Of Dropouts and Stay-ins: The Gershwin Approach,” Spring 1989]. Instead of fussing about dropouts, he hopes to turn all schools into good and serious places by allowing youngsters who don’t want to be good and serious students to leave. He cites George Gershwin’s decision to leave school at fifteen as evidence that outstanding career success does not hinge on possession of a high school diploma.