Also, for Bernhard how do you help an adult beginner see rapid progress with your teaching program? The claims you make for being able to play Grade 6 (ABRSM) pieces in 6 months are absolutely amazing. Do you only see this kind of progress with your younger students or do adult students who are absolute beginners (not piano drop-outs!)
My question is: What is the most effective way to practice scales, chords and arps? Right now I am practicing them in a sort of circle of fifths progression starting with just the white key scales, then adding the black key scales. Is this a good way to learn them? I also practice major, minor, augmented , dimished triads followed by major 7, 7th, dim7 and aug7 chords (and their corresponding inversions) with each tonic key of the scale(s) that I am currently practicing.