Not nearly as much as common knowledge that schools are protected by lots of teachers with guns and the training to use them to quickly end threats to students. The CPS Board of Ed is putting our children at greater risk by not implementing such a policy. But that's what to expect from liberals.

I put more faith in people, not an app, for a child's safety. Cell phones should be banned in school. I might compromise if cell phones where locked in a locker (muted) and/or a zero tolerance policy for cell phones in the classroom. In-between classes, lunch, etc is OK.