The district policies must restrict cellphone use during the entire school day, including passing periods, and make exceptions for emergencies.

Coppell High School, where Marli Field is about to be a senior, tightened its cellphone policy even before Texas Gov. Greg Abbott signed into law a statewide “bell-to-bell” ban on cellphones, laptops,

A majority of students across the nation will go to schools this fall where their cellphone use is restricted or banned. Florida has led the way in setting this trend. A new Texas law is taking effect this school year.