"A comprehensive study of child success, conducted in 2002 by researchers Karen Mapp and Anne Henderson, looked carefully at high-achieving students from all backgrounds. It found that the common denominator was relationship.
"'Their parents encourage them, talk with them about school, help them plan for higher education, and keep them focused on learning and homework.' The activity of relationship mattered more than money, more than other 'college prep' activities, more than electronics, more than material comfort.
--from _Nurture the Nature_ by Michael Gurian, emphases mine