Article from The American Baseball Coaches Assn. ........... Infield hit - Always look at your first base coach as you tear down the line.  He will tell you when the ball goes through and you should round the bag or go to second.  If you get the green light to second, start your banana turn early, touch the inside corner of first with your left foot, sprint to second and look for your third base coach on the way.  If the first base coach signals for you to round the bag but stay at first, the ball probably went to the outfield, but a second base is unlikely.  To do this you still take a banana turn at first, then round the bag after touching it, and look for the ball to determine if you can safely draw a throw.  Do not be thrown out or get into a rundown, unless the coach signals for it to score a runner on third.  Most often when the ball is hit to the infield, you'll be running hard through first.  Race the throw to the finish line, and remember you still win if the first baseman misses the ball because he took his eye off of it to see what's coming so hard and fast at her left.  Run through the base, and look to your right for an overthrow.  Don't wait for your first base coach to tell you to run to second, but listen for him to bring you back.  Be smart in any attempt toward second after you overrun the bag.  Remember, if you make a move to second, even if you're still in foul territory, you can be tagged out.

Outfield hit - Always run hard to first, even if it's a routine fly ball.  Don't waste your team's time feeling bad about your at bat; wait till it's actually over, on your own time.  If he drops the ball, you may get the green light to second so be half way there in your mind.  Usually you know when you hit the ball whether it's an easy single or a possible double, but run to first as if it could be a triple and it could be.  Take a banana route about half way down the line, tag the inside corner of the bag with your left foot, and either round the base or tear to second.  Be prepared to slide.  Remember to look at your third base coach and listen for your first base coach on your way to second.

Touching the outside tip of the base with your left foot allows your right leg and right arm to produce additional momentum toward the next base.  I suggest trying it and timing the runners using both meithods?  Of course it might take them a little time to adjust to the left foot touch, but after they do, you will see significant improvement in speed on the bases.   Don

Or new wives dont teach the correct basics of baseball?