On School's latter half, the jazz side of Maceo and company gets spotlighted -- Morris Hayes' graceful, lyrical piano (à la Herbie Hancock) in "Arts & Crafts," and Ron Tooley's energized, Miles-from-Dizzy muted trumpet squall in "Advanced Funk." Though never "retro," School's In has a curiously out-of-time feel, as if the past few decades never happened. There's nary a stylistic influence beyond the classic-funk epoch (1969-1975; the Meters, Funkadelic, War, etc.), with no concessions to contemporary trends beyond son Corey's rap on "What You Know About Funk?" A stone joy from beginning to end, School is a party waiting to happen.