It May seem a little weird but it flys good.
Step 1: Basics,
Fold the corners until they're touching.
Step 2: Envelope
Now make it into an envelope.
Step 3: Triangle Strip
Now fold both corners until only the triangle strip is showing.
Step 4: Corners
Now fold the corners until touching the triangle strip.
Step 5: Half
Now fold on half. You now have a paper airplane glider. You can now decorate it or fly it.