In this video, Joy Tietz, associate director of Minnesota Select Volleyball Club, shares a serving drill that has helped her players serve effective deep balls—the kind that push opponents to the end line to pass.

Using large boxes placed just beyond the end line in the seams of the court, she instructs her players to serve the last five feet of the court and hit the boxes off the bounce. These targets help players focus and serve seams.

If you’re looking for a way to get your team serving tougher, this drill might be the perfect fit for your next practice.