How Cellphones Are Changing School Emergency Plans

In the past, schools and cellphones didn't mix. Teachers saw them as a distraction, and many schools banned their use in the classroom. But in the wake of school shootings over the past 13 years, school districts are beginning to change their policies as a part of school emergency plans. Since the 1999 killings at Columbine High School in Colorado, school districts and law enforcement authorities have worked together on strategies to respond to violence in schools. Plans include how to protect s...