Whip (IR) feels out of control at first. Control can be a distraction. Trying to hit a target while learning to whip will make the process MUCH more difficult and delays proficiency greatly. Like Doc said, just play catch. Don't sit on a bucket until the ball is mostly doing what she wants. Even then, keep extra balls nearby and remember that the partner is a fetcher more than a catcher. Once she's hitting the torso regularly, move the glove around, but still without pressure to drill it. Honestly, she should be able to do this once her eyes are closed once she's got the hang of it. If she struggles, throw into a net.
Then you can play four corners from whatever distance she can have success (count how many throws it takes to hit four corners.)
Then you can play four corners from whatever distance she can have success (count how many throws it takes to hit four corners.)