A new study in the journal Child Development shows nighttime usage of a cell phone can increase anxiety and depression in teenagers and reduce self-esteem. This is the first study that shows a direct link between screen time and mental health. Psychologist and CBS News contributor Lisa Damour joins "CBS This Morning" to discuss tips for parents who want to decrease their teens' cell phone usage and how screen time affects important sleep habits. By: Lisa Damour

An influential doctors group is beefing up warnings about marijuana's potential harms for teens amid increasingly lax laws and attitudes on pot use. Many parents use the drug and think it's OK for their kids, but "we would rather not mess around with the developing brain," said Dr. Seth Ammerman. The advice comes in a new report from the American Academy of Pediatrics, published in Pediatrics February 2017. By: Associated Press

Protecting yourself from identity theft, especially during travel. By: Patty Lovett Reid     Length: 03:29

Drug prevention education in schools has evolved significantly since the “Just Say No” days of the ’80s — and now typically takes an approach that’s more appropriate for the era of ubiquitous weed access. It’s one that emphasizes decision-making and critical thinking skills instead of abstinence. By: Carrie Feibel