That is the worst coaching I have heard in a while. I teach a fluid motion NO step driving off the back leg then following thru. My advice is work at short distances with a weighted ball build arm strength and accuracy. The throw will get better and more down hill as she gets bigger and stronger. We have several catchers on all of our teams in the organization 2 signed D1 catchers I have worked with. NO STEPS PLEASE I ask mine to rock and fire, and be accurate. Stick with NEC basics and let her develop she will be popping in the 1.6's in no time.