How to handle students not returning borrowed equipment? I frequently bring my own equipment to the classroom for student use. Some students forget my announcements to bring certain items. Some items are infrequently used or kept ready on standby when time permits or need to be carefully prepared beforehand. For these reasons, I provide my own equipment, rather than requiring students to bring them.

The problem is, the students are walking out the door with my stuff. By the end of the year, I must go out and buy everything again. Most items individually are cheap (~$1 each), so I do not think any administrator or security officer will pay attention when I complain, however, the quantities add up over time.

I am surprised to find such behavior among college freshmen. How should I deal with these thefts?
I add an assignment in the grading system with a single point: "returned all borrowed equipment."

I don't actually use it in the calculations, but seeing it in the gradebook (which students can access) encourages compliance.