One more thing- girls definitely gravitate toward facing their target when throwing (like throwing darts), constantly reinforce with them the need to get sideways to the target (glove pointing at the target if you want to, otherwise have the elbow pointing at it). start with the glove shoulder toward the target and finish with the throwing shoulder toward the target. we are moving when throwing so don't expect to stand still while throwing. the whole body gets into it. (sometimes it helps for them to relate the throwing motion to a swimming motion where one arm is going back while the other goes forward)
good luck!
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Not trying to over-simplify things...but my girls were taught to step toward the target (toe pointed to side), ball initially pointed toward 3rd, point their glove hand at target, and lead the throw with their elbow (force them to snap the ball). Is this accurate?