Items you'll need:
Mat cutter or box cutter and straight edge
Step 1: Step 1 - Getting supplies
Matboard comes in a wide variety of colors and textures, but they all have a nice smooth acid-free surface on the back. Most are white, but there are some that are black - both surfaces make a great drawing platform.
Truthfully, matboard is fairly inexpensive stuff but why pay for it when you can get it for FREE? Besides, it's a great way to recycle material that is headed for the trash.
Just go to your local frame shop and ask if they have any scraps or discontinued colors. Most will just give you these items or charge you a nominal fee.
The matboards have smooth surfaces but they need a stiffer structure to be of any use as a drawing platform. I've found a heavy cardboard does the trick. Refrigerators and stoves come in huge boxes that are perfect for this project. I get free cardboard boxes from a local appliance store.