I can remember Spurs had a "shooting box" beneath the East Stand where forwards would smack the ball ages.
Didn't we all,as kids,spend hours kicking a tennis ball against a wall? No tv or computers for us in those days.
We also used to get excited when we played a game and the pitch had NETS!
So I would suggest someone giving our players a ball each and a brick wall and use it for at least an hours shooting practice.
If that doesn't work,give 'em a walking stick and tell 'em "your in the wrong game"!