What a difference a grade makes

Children with attention problems that emerge in first grade show poorer school performance for years afterward, including scoring lower on fifth grade reading. The poor performance occurred even if the attention problems were fleeting and improved after first grade. By contrast, children who developed attention problems starting in second grade performed as well as their peers in later years.

Fuente : http://www.eurekalert.org/pub_releases/2013-10/du-…