Tri-M Music Honor Society, formerly known as Modern Music Masters, is a high school and middle school music honor society and is a program of the National Association for Music Education (NAfME). It is designed to recognize students for their academic and musical achievements and to provide leadership and service opportunities to young musicians. Each school has its own chapter, which is run by the students but supervised by an advisor or sponsor, usually a school teacher. There are approximately 6200 participating chapters in several countries.
To be eligible for membership, a student must maintain an A average in their music classes, a C average in all of their academic courses, be presently enrolled in a music course at their school, and be recommended for membership by their school's music faculty.
Tri-M was founded in 1936 by Alexander Harley and his wife, Frances. At the time, Alexander Harley was the band director and Music Department Chairman at Maine Township High School East in Park Ridge, Illinois. It has been a program of MENC: The National Association for Music Education since 1983. In 2011, the name MENC was changed to NAfME or the National Association for Music Education.