Players work in pairs and stand across the court from each other. One player starts with the ball and overhand passes the ball high in the air.
While the ball is in the air, the player makes a quarter turn and sets again before turning again. The player keeps doing this until they have made a 360 turn, at which point they set to their teammate who does the same.
By turning, players improve their orientation and awareness.
Ask players to turn around clockwise and counter-clockwise.
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.