This year I have a really messy class. A colleague told me about the desk fairy poem. I thought it was a great idea, but I wanted it to be less cutesy. Here is what I came up with. So far, it has been a great motivator. The neatness of my students' desks has improved!
Here is mini certificate that can be placed on a student's desk each morning or every week with a simple treat. (I'm thinking of a small candy, homework pass, or small school supply.)