A study in Proceedings of the National Academy of Sciences found that the connections between one part of the brain to other regions can identify which 8- or 9-year-olds may not benefit from math tutoring. According to the study, increased volume of gray matter in the right hippocampus and greater connectivity between the hippocampus, the prefrontal cortex and the basal ganglia yielded more improvements in the child's math skills after tutoring. Researchers said pretutoring IQ score, working memory and math skills did not predict how much improvements such tutoring might accomplish.

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