Teaching a voraus begins with a target point,
you can use a food bowl, target stick, ball
hung from a tree as well as various gadgets
like ball droppers and launchers. Start with
a short distance (5 or 6 feet), begin by putting
the target at the end of the field and bring
the dog towards it, you may need to create attraction
by moving the target or getting the dog excited
by holding his collar and talking excitedly
to him.
The Youtube video below shows Gana doing a send away to her favorite toy, a Jolly Ball.