First of all I would make sure her draw length is correct, if its too long it will tend to stretch her out and very possibly pull shots to the left. If the draw length is ok, make sure she has a slight bend in her bow arm and that when she is at full draw that she makes a contious effort to reach out directly at the bullseye like she is trying to grab it with an open hand all the way through until the arrow hits the target. That will insure she isnt torqueing or pulling left or right.