when it comes to vault i use a base technique, but every kid is a little different, due to power, muscle twitch etc.... so you have to try a few different things with her, i recommend starting with the hurdle and arm position. if you notice her arms are bent in the arm circle/swing,,, so when the board compresses you can see her arms are already up and kind of "shot putting" instead of reaching with conviction. , then she has to reach down... to fix this ask her to try having her arm circle/swing just a tiny bit later and most importantly the arm circle/swing needs to finish more forward, not up, with straighter arms. i will often delay the circle/swing in the developmental stages just to get the arm swing angle correct, then they eventually end up circling a little earlier, but so long as the swing angle is correct you are good. also, warm her up on her setting, then drop 2 notches to try any of this. once this is fixed, then work on the elbows. my definition of swing angle is the transfer of energy, not just running down and hitting an angle, hope that makes sense.