I often find it is the simple youth baseball practice drills that work the best. Try these two drills to hone your teams skills.
A good drill for teaching how to swing through the ball is to soft toss water balloons.
Water Balloon Drill
I found that even after several batting practices using the machine, a lot of my players would swing half way to eliminate the sting. This carried over into our game play. I introduced the balloons and we started smashing the ball in the following tournament. I now do it at least once a week. Usually as the end of the practice, and especially the day before the tournament.
Calling the Ball
I have also found one of the simplest things my players do is calling for the ball.
Shouting “mine” when fielding prevents:
A) no-one going for the ball – because they all thought someone else was going for it.
B) kids banging into each other.
Splitting teams into 2 and putting half on 1st and half on 3rd base and getting them to run in when I throw the ball up and out and calling out as to who is going for it and the other player backing up. Simple but effective!