Every time a ball is shot on goal, offensive and defense must anticipate that the goalie will make a great save and the ball will rebound back into player or it will be dropped. By following-up the shot, attackers will score more goals and defenders will save more goals.
Using the instep to drive hard shots on goal is great but if they are kicked directly at the goalie, then there is no benefit in the velocity. A better solution is to use the inside-of-the-foot and have players think how they want to score a goal.
One of the most frequent yet worst bits of advice coming from the sidelines is, \”Shoooooooot!\” To increase the number of goals scored per game, forget about shooting. Dribble, dribble, dribble and then dribble around the goalie. Shooting is still OK but should be done from much closer range.