Trainers: shows basis, right leg forward, make plank, step in, etc.
In pairs with 1 ball. Player at the net throws ball to player in the back which passes back. Is the pass correct, then play overarm, but be strict!! 20 balls, then change. (Score keeping every good ball is a point)
Idem, only now the balls are thrown short/long, so back player has to move forwards/backwards.