My “Go To” drill to introduce a student to the correct Downswing routing of the club is the Under-Under Drill. See Video Here. Most of the over-the-top swingers have a misconception about the shape of the golf swing and will adapt fairly quickly to the new Downswing path. Occasionally, a student with a deeply ingrained swing habit will be unable to swing under the foam tube and will whack it every time. In those cases we have to change Top of the Backswing positioning to give them the best change to swing under the foam tube.