By night, percussionist Alex Jenkins has gigs with bands including Sound Immersion, Kairos Quartet and the Nada Brahma Music Ensemble. By day, Jenkins is at William Land Elementary School, teaching world rhythms and drumming to students in second to sixth grades. This summer, Jenkins is dedicated to raising funds for the drum program, which he started in 2003 with seed money from Best Buy. The drum class meets four times a week after school for free one-hour lessons. Students learn to play rhythms from around the world, including India, North Africa, West Africa and the Middle East. They play a variety of drums, including djembe, Darbuka, conga, bongo and snare and learn the history, ap