When I taught with tables, my team-teaching partner and I bought those Rubbermaid-style dishpans at the dollar store for each student. They put their folders/books/supplies in them and kept them under their chairs. We put the name tags on the tubs instead of on the table. Then, when we moved the students, we just had to move their tubs. We had around 48 students, and it only took a couple of minutes to rearrange them.