In 3's, defender marks the feeder, while the attack moves from side to side.
Marking the player: Cover as much of the surrounding area as possible. Make yourself as 'big' as possible by going onto tip-toes and stretching arms out. Watch the players eyes and try to anticipate where they are likely to pass the ball.
Marking the ball: Follow the ball with your hands, make sure not to obstruct the oppositions view.
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."