Wood and cardboard
For the laser cutter, we stock sustainably sourced "RevolutionPly" plywood http://www.patriottimber.com/RevolutionPly-Plywood.php cut to 24" x 18." Scraps from previous projects are on the shelf and we encourage users to make use of scraps for smaller projects. We also stock 24" x 18" corrugated cardboard. Some scrap acrylic is available, left over from other projects. Extruded acrylic (good for cutting) is available at Lowes and cast acrylic is available from McMaster-Carr.
All of our printers use 3mm (nominal) filament. We stock PLA on 1kG spools, in whatever color happens to be cheapest at the time we re-order. If you need another color, Amazon has a good selection. You're welcome to donate your leftover material for use by other students.
We maintain an inventory of threaded fasteners. Look through the bins by the back door, or search this spreadsheet https://www.dropbox.com/s/5vktjn0vgqtcoav/screws.xls?dl=0 to look for a specific size. If there's something inexpensive that you need and we don't have it on hand, send the stock number from http://fastenal.com to Dr. Walker and we'll include your fastener on our next regular Fastenal pickup.