Well, I don’t teach harp (sorry…), but I do teach violin, and the Suzuki method and/or books seem to work well as a beginning method for every instrument. The songs are simple, and introduce new concepts at a fair pace. Sorry I don’t help very much…I’m kind of self taught on harp. Good luck and I hope OTHER PEOPLE ON HERE will answer your questions. (lol) Have a good one…
I have been teaching young harpists and no prior musical training students for years and have estalished a well-working system. FYI.
1. colorful strings matching notes
2. reading LETTER (A-G) and playing children songs, i.e. Mary had a little lamb, row your boat, etc. finger 2 only though. Thumb up for sure.
3. try not to teach a new musician to read staff and notes too fast. Values of notes and reading grand staff are different concepts to teach seprately, and later to combine those information together. It usually takes a couple of months for such a young age to get them remembered. Make it fun!