From the New York Times:
Students who had learned much more in kindergarten were more likely to go to college than students with otherwise similar backgrounds. Students who learned more were also less likely to become single parents. As adults, they were more likely to be saving for retirement. Perhaps most striking, they were earning more.Read the whole article. The biggest question it brings up in my mind is that if life success is correlated with kindergarten success but high school test scores are not, what does that say about the usefulness of high school test scores?