Tri-M is a music honor society which serves the greater RSU 22 music community. Grade 10, 11, and 12 music students are invited to apply in the early fall and are selected by the music faculty. Students must carry an overall GPA of 85 and a 93 in music classes and must spend at least 10 hours volunteering to promote and support music in the school and community.

Meetings are once per month and activities as needs and opportunities arise.