This is a pretty basic and easy to make paper airplane, and it flies well too. In this Instructable I will show you how to make it. Please forgive me if an Instructable on this type of paper airplane has already been made. Please support me in my fight to win the Toss It competition! Muahahaha uuuuh.... yah, whoops. Anyways I did my best to make this as complete as possible, and hope you like it.
Step 1: Get a Piece of Paper
Get a piece of paper: printer or copier paper works best, but pretty much anything will do.
Step 2: Fold
Fold it lengthwise (hotdog style for those of you that still have a third grade mentality).
Step 3: Unfold
Unfold it so there is a nice strait line down the middle.
Step 4: Fold
Fold both corners until they are perpendicular to the middle crease. If you did it right they should also be touching each other when flattened.
Step 5: Fold
Fold the tip of the paper towards you so that when you flatten it the crease is on the same line that the corners meet. It may remind you of an envelope, but don't be fooled! Its not, paper just wont stay in there.
Step 6: Fold
Fold the corners so that they meet in the middle, but this time they should probably be at about a 45 degree angle with the each other when flattened (sorry the picture here is a little bad, so I took another picture just now, which is also kind of bad, since they wont stay flat)
Step 7: Fold
Now you are going to fold the tip that you folded down in step #5 up again. But. You are only going to fold it up as far as you can while still keeping the parts you folded down in last step down. This is going to prevent them from popping out and ruining the structure of the plane. It will be difficult to get it right, and if you can't do it, just do it as good as you can and follow steps 8-9.That will usually solve your problem.
Step 8: Turn It Over
This should be self explanatory. If its not ask a parent or trusted adult.
Step 9: Fold
Fold the left side until it meets the right, and crease it. It should look something like the picture.
Step 10: Make the Wings (Fold)
Now fold each side so the whole length of the wing, except the angled part at the end, is touching what was once the middle.
Step 11: Unfold
Unfold the wings so that they make a 90 degree angle at their fold.