This is true for most of us. We figured it out. But I would say that if the girls are aware of it in gym practice, the learning curve would be quicker.At the really young ages e.g. when they are just starting (maybe 4-8 YO), just having them charge everything is a decent idea imo. At least it gets their feet moving and not waiting back on the ball. At that age the long step to "choppy" step footwork we are talking about in order to get the best hop is probably not really possible. Older than that, yes working on the proper footwork to get the best hop is a must imo. That said, many centuries ago my father never worked on that specifically with me but I probably also took 50 to 100 GB every day in the summer from the time I was 7 so I figured it on my own I guess.