In this article regarding the new Michigan cellphone ban for schools, Brian Jacob offers insights from his related research in the state.
"For most districts, the law won't require much change in policy, but perhaps in enforcement, said Brian Jacob, the lead researcher on an ongoing study of cell phone uses in Michigan's schools at the University of Michigan Youth Policy Lab. Teachers will no longer have the option to be more lax about a school's no-phone policy, or to offer students time on their phone if they finish their work early."