Each player has a ball and should stand inside a 2m-diameter circle drawn with chalk.
The player throws the ball high above his/her head - it should be overhand passed up so it bounces inside the circle.
The player should allow the ball to bounce, get into position to use the overhand pass again to push the ball back into the air.
Alternate passing and bouncing.
Tell players the higher they pass up the more time and space they have to prepare for next pass.
Continuous passing in a circle.
New hitters rarely miss because of their arm. They miss because of their feet. Build a reliable approach, then time it with your setter.
When your hitter gets stuffed, five teammates standing and watching is how you lose the point. Good attack coverage turns a blocked ball into a second swing.
Coaches spend hours correcting arms in serve receive when the real fault is almost always the feet. Fix the movement and the platform fixes itself.