yjoy,

Kristen didn't ask what was the best form of instruction available. She asked about one instructor and possible options, (as I recall).

Kristen,

A good home course is available from Homespun:

http://www.homespuntapes.com/Instruments/Vocal/singing-basic-vocal-technique

I have it and used it years ago, back when it on cassette. It's a good course.