I have about 20 years of music teaching experience and my apps teach specific skills to help those who are struggling and/or in danger to drop out as well as those who are just beginning.
My teaching uses a little bit of everything but is mostly based on what I studied during my younger years.
Amazingly, HTML5 took a long time to arrive and get us to the point where we can develop all these apps for the children of tomorrow.
It is very exciting to be a child these days. All we had was primitive and crashing computers with a stupid operating system but now, things are different.
My apps are not quite ready yet but by the fall, Little Composers will lift off (fingers crossed).