The game of horse is usually associated with basketball, but here's a good one for volleyball that will give your players a fun way to practice serving.Players compete against a partner. Serves can earn a plus, zero or minus point. Coaches can set the bar anywhere they like for the scoring. For instance, a miss might be a minus. A zero might be a made serve that doesn't have a lot of pace. A plus might be a made serve that is hit hard and deep.
One player serves, then the other. If the second player gets a better serving score than the first player, the first player gets a letter – and vice versa.
Just like basketball, players compete until one player gets to "H.O.R.S.E." or whatever word is chosen.