The whiteboard drill, introduced by Salima Rockwell, encourages players to think strategically and communicate with each other.

Here's how it works:

Write four or five play sets on the white board -- e.g., an outside set, a middle set, a right-side set and a back row set. Put six players on each side of the court.

Each team has to score on every set. The winner is the team that checks off all the sets first.

Initiate each rally with a down ball or free ball, then let the teams play volleyball.

The setters have to think about which plays have already been scored on so they can run sets that haven't.

"I love this drill because it keeps players thinking," Rockwell says. "As you get further along in the drill, it becomes a defensive drill" because teams defend against sets that haven't yet been checked off.