Measure 2 inches in from each top corner of the paper and make marks at the top edge.
Make marks on the opposite corners one-quarter inch from the bottom of the paper.
Connect these points with a line. You should have a line going diagonally down each side of the paper in a mirror image.
Crease the paper tightly along the lines you just made.
Fold the top edge downward one-half inch and make a tight crease. Repeat this eight times; the purpose of this group of folds is to concentrate some of the weight distribution forward and tilt the nose down, countering the lift that the wings generate. Without weight distribution at the nose, the plane will continue to lift and eventually stall because it lacks thrust to generate lift.
Flip the plane over and fold it in half vertically.
Fold the wings slightly angled up toward the rear of the plane. The fuselage should measure approximately one-half inch at the leading edge of the wing and one inch at the trailing edge.
Throw the plane using a smooth horizontal motion and note how it flies. It should fly straight and gradually descend. Curl the wings upward at the rear edges to compensate for dive and curl them down to compensate for excessive climb.