Drag box has its place in the tool box, however the two step is in my opinion a better drill for a premature drive foot turn.
Keep shoulders and hips square to the target until 3:00, then as the stride leg gets fully extended, the hips will open as the ball circles over the top.
I'll put emphasis on feeling the pivot foot toes in the drive.... She needs to feel the toes roll up on point no later than 3:00 as well as a hamstring/glute flex as her drive leg violently extends. This will help overall drive mechanics
Keep shoulders and hips square to the target until 3:00, then as the stride leg gets fully extended, the hips will open as the ball circles over the top.
I'll put emphasis on feeling the pivot foot toes in the drive.... She needs to feel the toes roll up on point no later than 3:00 as well as a hamstring/glute flex as her drive leg violently extends. This will help overall drive mechanics