Kela, learning theory, how to pluck strings, how to read notes, how to read and play dynamics is all integrated into every lesson for me with my students. Many of my harp students have previously learned another instrument, so they come to me already reading music. However, with the ones who are truly beginners to music, I start out teaching them to read notes, a few at a time. I use flashcards (that I desktop publish and have laminated myself) for the notes, as well as the harp strings. Part of the homework and part of the lesson is to work through the flashcards. I add more and more flashcards until they have learned all the notes on the staff. Each week as they are learning more notes, I incorporate songs that include those notes.