An ingredient in the swing that is created by the proper motion, if I have posture and I have wind-up and I know how to hinge where my arms work correctly, the plane or the path that the clubhead travels on is created by those movements together. This is a good way for you to check your plane on the practice tee. I have a club down in front of the ball that represents my target line and then I put two clubs on my toe line each extending away from my feet one towards the target and one away from it. From here I would like you to check a couple of points in your swing. If your arms and body are working correctly, halfway back on the backswing, when your club is parallel to the ground, your club should essentially be over the club on the ground that extends from your right foot away from the target. When you are halfway through on the follow-through, when your club is parallel to the ground, you should be over the club that extends from your left foot towards the target. I also want you to notice how the club, the square position would be a relatively toe-up position. Also notice that as you continue along the backswing as the club angles and points back on the line that the club started on. That is essentially what we call the plane of the swing and it should be on the same line that your shaft started on at address. In other words, you would create an arc around the ball coming into the ball slightly from the inside and going through to the inside. This happens as a result of the proper body motion married with the proper arm motion, creating the proper arc on a plane. That is a lot of talk, we could spend a lot more time explaining plane and arc on a plane, but this is a very rough introduction to an important ingredient in the motion of the swing: the plane or path of your club as it moves to the ball.