Children who failed to acquire a basic math skill in first grade scored far behind their peers by seventh grade on a test of the mathematical abilities needed to function in adult life, according to researchers supported by the National Institutes of Health.
Fuente : http://www.eurekalert.org/pub_releases/2013-02/nio...
Fuente : http://www.eurekalert.org/pub_releases/2013-02/nio...