Founded by Peter Galperin in 1965, Everett Youth Symphony Orchestras (EYSO), based in Everett, WA, is comprised of 4 skill-graded orchestras with a total membership of approximately 200 students. Orchestras are led by professional conductors and receive regular coaching from instrumental specialists. The orchestras perform 3 public concerts each season at Northshore Christian Academy in Everett. Rehearsals are held every Monday evening at Kamiak High School in Mukilteo. EYSO is a volunteer-run 501 (c)(3) organization.