New York will require schools statewide to ban smartphone use during school hours, joining a national movement aimed at preventing compulsive social media use and distractions that interfere with school work, Gov. Kathy Hochul announced this week.

In more than 700 districts including New York City, school leaders will be required to create plans to store students’ smartphones “from bell to bell” and prevent their “unsanctioned use” during class, lunch and other parts of the school day.

The ban, which applies to students in kindergarten through 12th grade, will also restrict other “internet-enabled personal devices” such as smartwatches. The ban will not apply to basic cellphones that lack internet access, state officials said.

New York’s move follows the lead of roughly a dozen other states including California, Louisiana and Virginia that have moved in recent years to require districts to limit phone use, though the policies vary. Some states have banned devices only during classes; others have ordered districts to create their own restrictions.

The bipartisan movement to crack down on phones has been fueled by anxiety over the consequences of an “always online” youth culture. Today, about 90 percent of U.S. teenagers own a smartphone, surveys show. Nearly one in three 8-year-olds have a smartphone.

These bans come as policymakers are searching for solutions to soaring rates of depression, anxiety and self-harm among adolescents in the past decade. The U.S. surgeon general in the Biden administration warned last year that the addictive nature of social media could be part of the crisis, especially for young girls, though research on the issue is nuanced and mixed.