This is the seventh in a series of blogs examining benefits of parental supervision.

A study from Dartmouth University Medical School.has reported that media portrayals of tobacco and alcohol use are associated with adolescent smoking and drinking. They studied the role of parents in monitoring and limiting children’s movie exposure and whether or not this was associated with a lower risk of adolescent smoking and drinking.

In a recent post I examined some of the ways that excessive use of electronic media can be a danger to young people. But how does media exposure affect children's school performance?