My students are all ready in the habit of bringing their small wet work of art up to the dry rack on a place mat. Many of the projects my intermediate students create are smaller, and they fall through the rack causing mass chaos. My dry racks only hold work up to 12" x 18". For years I have reused 12" x 18" construction paper to do the job.
I just figured out a way to keep the dry rack neat and make passing back artwork a breeze. Color-coded place mats! If you sit at the red table, you get a red placemat, if you sit at the green table, you get a green one.... when they bring them up to the rack, I can sort them immediately by table as I put them to dry - or older students just put them on by themselves. When they are dry, I can easily discern what folder to put them in.
It is working great and saving loads of time passing back work!