Explores new brain research done on adolescents and details how this research explains some typical adolescent behaviours. It looks at how teenagers "read" expressions on people's faces and often get miscues about the feelings of parents and teachers because they are processing visual clues with a different part of their brain than adults. Adolescents attend a sleep clinic and viewers watch as an experiment shows how seriously a lack of sleep affects learning. Explores some myths about young adolescents.

A Spin Free Production for Frontline/WGBH in association with CTV and Discovery Canada.