Study links children's lead levels, SAT scores
Could a decades-long drop in the concentration of lead in children's blood help explain rising SAT scores?
A Virginia economist who pored over years of national data says there's an "incredibly strong" correlation, which adds to a growing body of research on lead's harmful effects.
The findings, to be published this winter in the journal Environmental Research, suggest that from 1953 to 2003, the fall and rise of the average SAT math and ...
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