Abstract: A golf monitoring device and method of use thereof relates to a one-piece elongated layer of rigid but slightly flexible plastic that has fold lines and can be folded into three sections. The device has a front edge and a rear edge with one straight side edge and one curved side edge. The device fits entirely between the golfer and the ball with the golfer's feet adjacent to the straight edge and the ball adjacent to the curved edge. The ball is located on an opposite side of the device from the golfer's feet and neither the ball nor the golfer's feet are supported or located on the device. The curved edge approximates a two-dimensional path of a golf swing. Along the straight edge is a rear foot indicator, which is variable within a defined limit, and a front foot indicator which is fixed. On the curved edge, there is a ball indicator which is variable.