In this drill, arrange your team on the court so that you have somewhat equal numbers in each of the four corners of the court, then a target in the setters spot on each side.
In this drill, you always follow the ball. The goal is to pass up to the target so that it lands on their forehead. (setting position)
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.