The driving range at the end of Crystal Rock Dr. in Germantown utilizes cutting-edge instruction technology to improve your swing and decrease your score. While you can always just buy buckets of golf balls and swing to your heart's content, the range's owner John Hafera says his enterprise offers "a teaching side that is unique to the area." John and two other instructors are certified by the Titleist Performance  Institute and use 3D motion capture technology to analyze your swing and make corrections. And if that fails, you could just practice your accuracy by aiming for the roving ball retriever.