This instructable will teach you how to build 3 simple paper airplanes. I'm not really sure if they have official names but I call them the dart, hornet, and kite. First will be the dart, then the hornet, and then the kite.
Step 1: The dart
All you will need to make any of these planes is a single piece of paper. To build the dart, first, you will need to fold it in half once lengthwise. Next, unfold it. After, take the upper corner and fold it to the center of the paper. Repeat on the other side. Now, bend the outer tip back to the center. Next, fold it in half. To finish pull the outer edge on top down to line up with the bottom edge. Repeat on other side to finish.