* What do you mean by "efficient way"? Piano pedagogy is an old system that's been perfected over 200 years. What aspects of this system do you believe to be inefficient?
* Are you trying to supplement piano lessons taught by a teacher or are you trying to replace a piano teacher?
* Are your target students looking to learn classical piano or pop or jazz? Do they want to learn basic chords to sing along with, or do they want to learn to play instrumental pieces?
* What do you mean by "efficient way"? Piano pedagogy is an old system that's been perfected over 200 years. What aspects of this system do you believe to be inefficient?
* Are you trying to supplement piano lessons taught by a teacher or are you trying to replace a piano teacher?
* Are your target students looking to learn classical piano or pop or jazz? Do they want to learn basic chords to sing along with, or do they want to learn to play instrumental pieces?