Keep track of which file is located where on the print bed

Hi,

I'm printing a lot of 3D models generated by my students. I use Repeiter-host to setup the build platform for each 3D print. Each 3D print has 10 models or more on the build platform.
How do I keep track of which file is located where on the build platform? For example, I want to know that the back-left 2 models are Joe's parts, the front-right 3 models are Sally's parts, ... and so on. I can rename the .stl files so that Joe's parts are joepart1.stl, joepart2.stl, sallypart1.stl, and sallypart2.stl. It would be nice if I could have a 2D print out (on a normal piece of paper) that showed the filenames and their location on the print bed. Any ideas??

Thanks,

Anthony