Actually, I am a harp teacher, and my students range from nine years old to
60. My name is Elizabeth Volp?. I always throw in theory as part of the lesson,
because it is so important for harpists to understand what harmonies they are
playing. Without an understanding of keys and modulations and modes, it is
nearly impossible to make musical sense of your pieces, and it is also much
harder to memorize. There are excellent theory books by Mark Sarnecki.
I’m a 12 year old, and I study with Franziska Huhn. I do study theory in my lessons, and I spend about 30 minutes per lesson. I don’t really know if what my teacher uses could really be classified as a book or not, because it’s a big binder full of papers on theory, and she also has some notes that she took herself when she was learning theory. I think that studying theory is useful, because it makes reading the music a lot easier, because you can recognize chords faster.