Editing Tri-M (section)

=== National expansion ===
In 1952, Maine Township High School Superintendent Harry D. Anderson attended the initiation of TRI-M and felt the organization could have broad appeal to other high schools. He urged Harley to incorporate. With the help of the History Department, TRI-M was incorporated as "Modern Music Masters." Its membership steadily grew and it became an international organization with chapters as far away as Asia and Europe. Harley and his wife traversed the country to start chapters.