Purpose: Teach blockers to keep their hands wide and cover space along the net.
How it Works: Tie shoestrings around the blocker's wrists so they are connected. As the blocker moves throughout her blocking drill, make her objective that the shoestring stays as tight as possible (with as little slack as possible). This will encourage her to keep her hands wide, rather than letting her hands narrow closer together and then lessen the area covered by the blocker's hands.
Requirements: One blocker, one shoestring and a net.