which of the following is not a personal technology safeguard that school staff members should practice?

The personal technology safeguard that school staff members should NOT practice is "not maintaining personal social media accounts, even with privacy settings." In other words, it is not required or expected that school staff completely avoid having personal social media accounts with privacy settings as a safeguard. Other valid safeguards include not "following" or being "followed" by students, not "friending" or accepting friend requests from students, and not distributing personal phone numbers to students.