It’s a smartphone world, and there has to be room for teachers and coaches to communicate with students about everything from a tweak in a homework assignment to a change in venue for an upcoming track meet. But keeping that interaction on CPS email addresses, social media accounts and mobile devices is a safe and reasonable goal. Predators are more likely to be deterred if they know their texts and messages to students are no longer shielded within their personal devices and accounts. And students or parents who learn of communications from a staff member’s private accounts will know that something is amiss.