The easiest thing would be to buy a ready made pocket chart (Walmart usually has standard pocket charts at a very reasonable price in the weeks before school starts). Reallygoodstuff.com has them in a variety of sizes.

To make one you would need to purchase rip nylon and clear vinyl along with heavy duty thread and have access to a sewing machine. You could also use cardboard, good ol’ duck tape, and clear vinyl. In the long run it would probably be cheaper to buy one ready made.

If you are look for a small one or two pocket chart for your refrigerator or cork board, you can buy clear document jackets at the office supply store that may work for your needs.