Cell phones are mainly banned because of being a distraction. However, after 911 events, parents want their children to have cellphones because it makes parents feel better in a school crisis.

Cell phones are mainly banned because of being a distraction. However, after 911 events, parents want their children to have cellphones because it makes parents feel better in a school crisis.

http://www.theatlantic.com/national/archive/2012/05/do-cell-phones-belong-in-the-classroom/257325/

This is an atlantic source about pros and cons of cell phones in high school, questioning 21st century technology and how it should be used in the classroom.