Buy a rotary cutter that can be switched (if she buys a retractable), like an olfa or a fiskar. I prefer the Olfa Ergonomic ones myself. There is a new one that is out with a comfort handle, but the blade cannot be set up for a left handed person. Most scissors these days tend to be either hand.
I've noticed that quilting is less of an issue for me than knitting or crocheting (those are definitely more of a handedness issue). Most of our toys are not really left or right handed.
I forget which books by certain teachers include cutting directions for left handed people, but I have never really had an issue with any pattern as well it is well written.
I just bought a Panasonic Cordless iron, which is nice, since I always had an issue with irons and ironing boards that are definitely geared towards the right handed.
Hope these few ideas help and tell her welcome to the club. As far as teaching her, start simple and there are some good videos online these days. Missouri Star has some simple ones and there a great many others.