It took me nearly an hour to go through all the responses, and I'd like to say thanks for the very informative info.
From the jist of it, I realize that TKD is total crap. That's too bad because I've spent over $5,000 in tuition for my step-daughter over the years. She is now a black belt at age 9 and I wonder how much of those skills are portable - in that she will actually be able to use them if she had to. But, back to my wife for now...
Wife's a high school teacher, and as you can see from her pics, she weighs about 105 lbs - and about 10 lbs of that are her boobs! The problem is that she's insane. She is always getting between students who are fighting, and I am afraid she's going to piss someone off one day. In her defense, she is suprisingly strong for her size and weight. We "play fight" sometimes, and when she hits - it hurts!
So, I need her to have some basic self defense tactics for "street use", nothing else. Maybe some dirty tricks - eyes, nuts, etc., so that she can do damage and get away. That's the best way to put it.