I don't teach it...and don't need to, but I am interested why some of you teach and talk "toe touch" "heel plant" "when the front foot is down then..."
What does the front toes touching the ground do for you?
For me,
The Mechanics are: Once the weight is gathered into the inside of the back upper leg by hip coil (or at least by "sitting down into" the inside of the back leg), the front leg leads the hips to eventual unloading/uncoiling by stepping onto the inside of the front foot on a flexed front knee, keeping the front side closed so the hips stay coiled and closed until you initiate the swing by planting the heel (no teach) and then uncoiling the loaded back side by driving the back hip into the front hip into a firm (but not rigid/locked) front leg/front side. That's a long sentence, but it's hard to break up because it's all part of one connected sequence.
The Thought Process is: "I'm trying to drive (transfer energy) the back hip (back side) into the front hip (front side), I don't want to overstride (3"-4" is plenty), and I want to hit into a firm front leg/stay tall on the front side."
I think you should show her lots of video from the "Model Swings" thread and see just how all of the great hitters posted there do it. While there is some degree of difference as to exactly how each of them stride, most have basically the same mechanics. Aside: Watch out for those Univ. of Florida hitters, you may want to gloss over them for now!
I agree with most everything except (3"-4" is plenty). 4" is nothing. More like 12"-18" if using the Ruth-type stride. Ruth's was longer. 3-4" would have a batter standing over their front foot with any kind of good forward shift.
My favorite stride is the Babe Ruth stride, but there is no player that I work with that strides that way. I do use it as a drill occasionally. I believe if other coaches/parents weren't opposed to it, that a few of the players could benefit from using it.