$320,000 Kindergarten Teachers-
Researchers following a cohort of 12,000 children from kindergarten to age 30 ..."estimate that a standout kindergarten teacher is worth $320,000 a year. That's the present value of the additional money that a full class of students can expect to earn over their careers. This estimate doesn't take into account social gains, like better health and less crime." The results of the Tennessee experiment, known as Project Star, were reported in a July 21 New York Times article, "The Case for the $320,000 Kindergarten Teachers." Excerpts from this article-
"Just as in other studies, the Tennessee experiment found that some teachers were able to help students learn vastly more than other teachers. And just as in other studies, the effect largely disappeared by junior high, based on test scores. Yet when Mr. Chetty and his colleagues took another look at the students in adulthood, they discovered that the legacy of kindergarten had re-emerged. 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. All else equal, they were making about an extra $100 a year at age 27 for every percentile they had moved up the test-score distribution over the course of kindergarten. A student who went from average to the 60th percentile- a typical jump for a 5-year-old with a good teacher- could expect to make about $1,000 more a year at age 27 than a student who remained at the average. Over time, the effect seems to grow, too...
The crucial problem the study had to solve was the old causation-correlation problem. Are children who do well on kindergarten tests destined to do better in life, based on who they are? Or are their teacher and classmates changing them?...
"Class size- which was the impetus of Project Star- evidently played some role. Classes with 13-17 students did better than classes with 22-25. Peers also seem to matter. In classes with a somewhat higher average socioeconomic status, all the students tended to do better. But neither of these factors came close to explaining the variation in class performance. So another cause seemed to be the explanation: teachers. Some are highly effective. Some are not. And the differences can affect students for year to come."
From: ExchangeEveryDay- a free service of Exchange Magazine.
