Walk into any first-period high school classroom and it's obvious: teenagers are exhausted. Sleep deprivation is an epidemic as widespread as obesity--and just as damaging. Fortunately, science has answers and Dr. Helene Emsellem has solutions that all parents can use. Affecting the lives of more than 41 million adolescents in the United States alone, sleep deprivation is a chronic problem for kids today. We know this intuitively as we watch teenagers...