As the drill goes on there will be a growing target on the other side of the net. This makes the drill easier for players who struggle with their serving.
You'll also probably find your players encouraging one another and being supportive which will help improve team chemistry.
To make this harder you can enforce the rule that the seated player must catch the ball for the serve to count.
Create a resolution to develop your coaching confidence by seizing the opportunity to discover new drills, turn ideas into action and seek advice from the coaching community.
World Rugby has reportedly conceded Aaron Smith's disallowed try in the World Cup final should have stood.
"It is not only useful for staff who are experienced but a valuable tool for those subject staff who have to take teams."