This is a concept at this time, but it should work well. I have seen others do lessons using FaceTime. One thing that is necessary is that the student has to have a history of lessons in person so that she can understand the concepts and adjustments that may need to be made.
Another route would be sending video via FTP to my website and I could do an analysis and send back the results. Also somebody might have a technology that would work better. This is a work in progress and I am willing to try it.