Noteworthy is an auditioned, highly select group of treble and bass singers who are serious about the jazz tradition. Noteworthy is open to all grade levels and performs at festivals throughout the year in addition to three home jazz concerts.  Noteworthy meets during 0 period five days a week and periodically schedules rehearsals outside the school day.

La Voix is an auditioned, select group of singers who are serious about the jazz tradition. La Voix is open to all grade levels and performs in regional festivals throughout the year in addition to three home jazz concerts. La Voix meets during 0 period 4 times a week.

Vocal Jazz Workshop is a non-auditioned course open to students of all grade levels and music backgrounds who want to learn more about jazz and develop their vocal musicianship skills. Students can enroll in Jazz III for one or both semesters and do not need to be concurrently enrolled in another ensemble at Mount Si. Jazz III meets during zero period, two days a week.