Piano exams aren't so popular in the US and few do them.
Personally, though I wouldn't want to live in the US, I'd love to teach piano because of the vast amount of teaching aids. It seems that whenever a piano teacher creates something to help, it gets marketed and goes on sale for the rest

...and of course, so inexpensive. They come up with some brilliant ideas.
I would suggest she joins one of the yahoo groups such as. Very active groups, mainly American piano teachers.
http://launch.groups.yahoo.com/group/piano-teachers/