As someone organizing master classes, and seeing a failure of students to sign up for the AHS student recital, I feel I must remind teachers that their students must always have at all times at least two pieces that are performable. Memorized or from music, fully learned and musical, and music that is worth listening to, not something for pedagogical purposes only.
There are lots of pieces in our repertoire that serve both purposes, without even looking at music composed by harpists.