Players work in pairs with two balls between them. One of the players will have both balls.
The player throws one of the balls, and their teammate lowers their position to pancake the ball with their left hand, before doing the same with their right hand.
To make things harder, two balls might be thrown at the same time or player could be forced to run prior to taking pancake.
It is very important to bend knees significantly so whole hand could be put on the floor.
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.