As a teacher in twentieth century Ottumwa, Iowa, Clark spent ten minutes in each of her chorus rehearsals telling students about composers or helping them recognize the stylistic features of a work that made it possible to place it in its correct historical context.
Clark made herself an authority on the use of the phonograph to teach music to children and in 1910 spoke to the Wisconsin Teachers Association on "Victrolas in the Schools."
Edward Bailey Birge, president of the Music Supervisors National Conference (later MENC), invited her to present this subject at his MSNC program in Detroit.
Within a year she had moved to Camden, New Jersey, where she established an educational department for the Victor Talking Machine Company.
Clark remained with Victor for the rest of her professional career but kept up with the times in the 1920s, when she promoted the radio as an avenue to music appreciation.