Yes I respect neuroscience.
And I will wait the six years to see what you might have to say.
But until them I am appalled that so much misinformation on this 
subject abounds.  It really is important, and it may be abundantly 
simple. 
 
Historically, when people started to see the difference, it was inherent taht so many right handed meant that any one who was dominant with the left hand was wrong.  The old right and wrong (left or left out) is pathetic.  When I first studies French, I was not the least bit amused to find that right handed meant law abiding, and left handed meant theivery. 
At age eight I had a third grade teacher who really believed that because I was left handed that I was a child of the devil.  And screeching at me that nice bit of bad news she took a metal edge and prodeced to beat my left hand into a bloody pulp.  This went on for weeks until I relented and became a good little boy, and one of God's children, which she announced proudly to my third grade class.  
What this led to was horrendous.  I in a matter of days began a routine of stammering and stuttering which would continue until I was 22 years old.  I call it the lost fourteen years.  She also severed the tendons in the third and fourth fingers of my left hand which made it impossible for me to write left handed.  I also become anxious and quite depressed.  Hating school became my mantra.  I also hated her.  At the slightest whim I was locked in her closed for hours afraid of the dark, and terrified that she would forget me and I will have no way to escape and go home on the bus.  
Well meaning people, and I am an educator, and many educators try to fix children, when there is nothing wrong to begin with.  Once a label is placed on a child, it is almost impossible, even over a life time to remove the label.   I mercifully had a teacher in graduate school who was common sense learned and compassionate.  He set me on a path to recovery from stuttering, anxiety and depression.  He had me write left handed again. Even now, I tear up how quickly I began to feel better.  Someone I respected and who had authority over my young life set me free.  In a few days the stuttering stopped.  Overnight the anxiety and depression began to life.  
What he understood is that I suffered from an issue of mixed dominance.  I was left footed, left eyed, and then forced to be right handed.  How can you tell if your child is left or right eyed?  What is the dominant eye.  It is unbelievably simple.  Take a piece of copier paper and role a funnel of paper with an opening about one inch circular.  Have the child hold the paper with the funner covering the face, and look at you and focus.  Then identify the eye that is looking at you through the hole.  That is the dominant eye.  
Ideally, a person has all right or all left dominance.  When a child has mixed dominance, there is often a series of emotional problems that mark his or her life.  My third grade teacher was a child abuser in her way of not coping with my left handedness.  Today I have terrible scars over both those knuckles, and I suffer terrible arthritic pain and trigger finger with that hand, a constant reminder of people who wanted me to write with another hand.  
Find what the child wants and needs, and then with compassion and understanding help him or her to develop as they are naturally made.  Living in a right handed world is sometimes so irritating that I want to scream.  Opening a right handed door with a load of groceries, is outrageous.  Cars with righthanded gear shifts, and right footed accelerators, and left foot clutches.  Refrigerators that open in the opposite direction.  Many times my knuckles still show fresh scars as I continue to adapt to what is intended for only right handers.  
Shep+