Governor Gavin Newsom on Monday signed legislation that directs school districts across the state of California to draft and implement policies that will limit students' use of cell phones during the school day.

Calls for crackdowns have mounted with reports of cyberbullying and studies indicating that smartphones are harmful to children’s mental health.

A growing list of states and schools are now banning or restricting cell phones. Johns Hopkins experts Carol Vidal and Annette Anderson explain the research and weigh in on the controversial policies.

School districts in California will have to create rules restricting student smartphone use under a new law Democratic Gov. Gavin Newsom signed Monday. The legislation makes California the latest state to try to curb student phone access in an effort to minimize distractions in the classroom and address the mental health

Gov. Gavin Newsom on Monday signed legislation into law that directs school districts across California to draft and implement policies that will limit students' use of cell phones during the school day.