This is how it works in my kids' school. Not Estacada, but not that far away, and not in Portland. No pouches or lockers, just an understanding that phones which are seen will be confiscated. First time they get sent to the office and returned as the student leaves school. Second time they have to be picked up by a parent.

You'd think it would be a huge deal with rebellious teens, but my daughter says it has basically been a non-issue.