Visual reminders for students to bring things home/ to school. E.g., a simple paper bracelet reminds students to bring back their library book. Another example: black dot on students' thumbnails as a reminder to bring back a signed permission slip.
This is a guide to calling a parent with bad news. In every teacher's life, they will have to do this at least once, and this is a great way to get an idea of some things to say, without hurting the parent.