The way you deal with your kid while he is still in kindergarten, effects his behavior in the later years to a great extent.
This is something that I came across on Ascribe, that reported about a study made by Wichita State researchers.
I would say this is not to be called a fresh study altogether, as every good parent must be aware of the fact, that they cannot teach the child everything when he/she is 12. They have to begin with things much early.
But still the article is worth a read, as it will give you an idea to do things in a better and more systematic way.