Mobile phones don’t have a place in the classroom

Here are Common Sense Media's guidelines for cellphone carrying kids. (Fotolia)

Of all the places where a mobile phone does not belong – at the dinner table, near a steering wheel, in the hands of a president before 8am – close to the top of the list is in the classroom. 

In the last five years, however, many large school districts in the US have lifted their restrictions on smartphones. They'll come to regret it.