Players form a row in zone 2 or 4. setter is in 3. hitters start from the blocking position where they mimic the block, then go back and approach for the hit and hit. Coach tosses the ball to the setter who sets for hitters.
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.