A system for teaching proper takeaway of a golf club during a golf swing uses an apparatus having a sliding element for engaging a back of the golf club when the club is in a set-up position. Charged objects 2 such as beads and live cells are moved electrokinetically, like as in electrophoresis, through a solution, typically water 3, towards a micro-patterned charged semiconductor electrode, such as a silicon electrode 11 patterned with silicon dioxide, silicon nitride or agarose gel. A spring is disposed in the hinge.