Soccer technique and techniques such as dribbling, receiving, passing, shooting, "moves" and throw-ins are critical to good play.
Soccer technique links are below.
How to coach soccer technique and techniques, positions and formations are explained in SoccerHelp. It might be also be helpful to buy a video such as "Just Kickin'It" (which shows how to teach players to kick and pass the ball) or "Super Soccer Skills" (which shows how to teach soccer moves).
Soccer Drills that Teach Dribbling, Passing, Throw Ins, One Touch, Aggressive Play, Age 3-16
Soccer Skills - Passing and Receiving
How to Teach Soccer Throw-Ins
The Best Way to Teach Soccer Dribbling
The Best Soccer Drills to Teach Skills