Teach blockers to surround ball and penetrate the net.
1. Holders stand on chairs and hold balls on their side of the net above the net, but close enough for the blocker to reach over and grab it.
2. Blockers jump up penetrate the net grab the ball with both hands and pull the ball and throw it behind their hand bouncing it on the ground.
3. Blocker step closes to the next holder and repeats step three.
4. Repeat steps 3 and 4 as many times as desired.