Our aim in science is to throw a paper plane over the arch and to fly the furthest 

1. Fold the paper in half vertically.
2. Unfold the paper and fold each of the top corners into the center line.
3. Fold the top edges into the center line.
4. Fold the plane in half toward you.
5. Fold the wings down, matching the top edges up with the bottom edge of the body. 
6. Add double stick tape to the inside of the body The finished plane should look like this 

1.