There isn't a lot of research that links early childhood test scores to earnings as an adult. But new research reveals a surprising finding: Students who learn more in kindergarten earn more as adults. They are also more successful overall.
Harvard University economist John Friedman says he and a group of colleagues found that students who progress during their kindergarten year from attaining an average score on the Stanford Achievement Test to attaining a score in the 60th percentile can expect to make about $1,000 more a year at age 27 than students whose scores remain average.
Taking into account all variation across kindergarten classes, including class size, individuals who learn more--as measured by an above-average score on the Stanford Achievement Test--and are in smaller classes earn about $2,000 more per year at age 27.
John Friedman discusses this in his video here.
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