The jump serve can be a funtastic weapon; it is both powerful and deceptive. The jump serve can create difficulties to your opponents if they are not used to facing this type of serve. Basicly, the jump serve is very similar to attacking technique.
The main difference is that instead you attack a set from a teammate, you attack the ball that is thrown high by yourself. Hold the ball in front of your serving shoulder as you prepare for the toss. Use a one-handed toss, but toss the ball with your serving arm. You will launch yourself into the air to attack the toss, so toss the ball high in front of you. It is essential to coordinate the toss with a sequence of steps, allowing you to jump and swing naturally. Step forward on your nondominant foot as you toss the ball.