a) Defensive slides
Coach points left or right, players facing coach slide in that direction, when coach stops pointing, players slide to return to their starting positions (use flat cones to mark them). Go for 15 seconds, then the next group comes on.
Lee Taft - only 8 seconds for speed training.
(Variation - to work on diagonal retreat slides, have players spread out along the far sideline, sprint to the near sideline, pitter-patter, drop step or hip turn and slide back left and right as coach points, until returning to the starting sideline)