The French government has enacted a permanent ban of cell phone, smart watches, and tablet use by children in elementary and middle school. Aside from not being allowed in classrooms, they aren't allowed in hallways, break areas, recess yards, and cafeterias.
The ban ends at high school, but many schools are considering carrying the ban on further. The law was part of French President Emmanuel Macron's "Republic on the Move" campaign, which was meant to curb distractions and prevent bullying. It has been criticized by other French politicians, who call the law a gimmick.
There are legitimate concerns about children's use of cellphones. Children have thinner skulls and are more vulnerable to harmful radiation, according to a study in the Journal of the American Medical Association by Dr. Nora Volkow and written up in the Chicago Tribune. In addition, a child who overfocuses on using social media will weaken interpersonal skills and blunt their sense of empathy. For children, face-to-face interactions are the primary ways they gain knowledge and learn.