The study's findings showed the pre-school benefit held up regardless of economic status of the children.
The authors say their findings point to the benefits of nations such as the U.S. establishing universal pre-school programs.
Study links pre-school to academic success
Researchers have been tracking 3,000 children since the age of 3.
Those children are now 10 and the standardized test scores of those who attended pre-school tended to be higher than those who did not.
