I want to second Jane's request here. It is really disheartening that music was not valued as a worthy focus. Nothing like a Khan set up is available elsewhere. Sure, there are helpful online resources with method books that are free. However, there is no system that allows us music educators to just assign time within a level of music theory to give to our kids. I would love to be able to assign time within a system like this so my students who can't take an instrument home can at least have a smart system like Khan expose them to the cognitive side of reading music.