Abstract: When a golfer strikes a ball on a tee connected to a latch release for a pivotally mounted arm, the arm is accelerated by a preloaded torsion spring from an inactive (vertical) position to an indicating (horizontal) position in which an opening in the arm is disposed on the same line of sight from the golfer as the tee. An endless tape, which is supported by the arm, has a number appearing in the opening for a short, selected period of time after the arm reaches its indicating position. The opening is blocked by a slide after the selected period of time has elapsed so that the golfer will not see the number if the golfer fails to maintain eye contact with the ball impact area after striking the ball on the tee. When the arm is returned to its inactive position, the number on the tape can be viewed from the opposite side of the arm having the opening so that the golfer can ascertain if the number was viewed.