Abstract: A technique for monitoring a golf swing, human movement in other sports, and other activities involving human movement and for teaching and reinforcing desired human movement. A golf swing is monitored for a golfer swinging a golf club through a tee area while standing on a platform housing a tee manipulation mechanism. Six or more infrared (IR) transmitters transmit respective IR beams along predetermined lines in close proximity to the tee area. Each predetermined line defines a portion of three-dimensional space critical to the optimization of the golf swing. Respective IR sensors receive the respective IR beams. Each pair of IR sensors provides a respective output signal indicative of improper club shaft or body positioning. This device is designed to monitor club shaft and body position and alert the golfer to undesirable positioning via audible buzzer, signal lights, and a golf ball removal system.