Challenge your students to keep their pencils as long as possible!
Put their students numbers (or names if you don't use them) on a pencil- one per student. Then, write a "check-in" date on the sign. When the check-in date arrives, see who was able to keep their pencil!
(Laminate your sign so you can write in and wipe off new dates!)
This is a great way to minimize pencil loss in your classroom!