Lineout

The thrower should:

adopt a stance with a stable base
take a two-handed grip of the ball
throw the ball from behind head, spinning towards target in one smooth action keeping elbows tucked in close together
follow through towards target

The jumpers/supporters should:

communicate effectively with team mates
outmanoeuvre opponents into space
make an effective, quick jump reaching to catch ball with arms extended to full height
deliver the ball accurately to team mates either in air or once landed
provide safe, strong and stable support from in front of and behind the jumper to aid jump, control the jumper in the air and bring jumper back down to ground safely