Here are some pictures to show you how to do the same:
Images © 1990-2009 Stampin' Up!
Step 1. Cut your card to the height you want the finished card to be, then times that measurement by three and cut the card to that length. Next score that same distance in from both ends. You should now have three equally scored sections.
Step 2. Score corner to corner on the center square and fold as shown above and below.
Step 2. Score corner to corner on the center square and fold as shown above and below.
Step 3. Fold the card as shown below. The card will now feel like it is upside down, so just turn it so it looks like the second picture and it will look right. Once you are happy with it, add adhesive - remember, where the pocket is, you just need to add adhesive down the edge, so that you can slide your check, money, recipe or greeting into the pocket.