US states want to ban phones in schools. How would that work?

As a middle-school teacher, Nancy Streit understands how hard it can be to compete with a smartphone for a child’s attention.

But as a mother, she knows the devices are a necessity when there’s an emergency.

“It’s mostly the parents calling,” she says, adding that while she doesn’t allow phone use in her classroom, students routinely skirt the rules.

The Los Angeles school district where Ms Streit teaches – the second largest school district in the country – is the latest to ban smartphone use in schools this week.

It is part of a growing and familiar trend as more states and schools across the US weigh how to manage the growing dependency children have on their devices.

New York and California, the two most populous US states, are weighing new state-wide policies on the issue.