The more time that children spent in child care, the more likely their sixth grade teachers were to report problem behavior.

Also, children who got quality child care before entering kindergarten had better vocabulary scores in the fifth grade than did youngsters who received lower quality care.

The findings come from the largest study of child care and development conducted in the United States. The 1,364 children in the analysis had been tracked since birth as part of a study by the National Institutes of Health.

Read (AP via the Discovery Channel)