"There is an interesting paradox in teaching: the better you know a subject, the harder it is to talk to beginners. Experience means you have forgotten what tri

"There is an interesting paradox in teaching: the better you know a subject, the harder it is to talk to beginners. Experience means you have forgotten what tripped you up when you were a beginner." This reminded me of how I always have to clearly explain to my beginner piano students that the higher the note on the staff, the further right on the piano it goes. It's very non-intuitive that up/down on the staff = right/left on the piano.