1. Paper Helicopters! A lesson in flight and air resistance

2. Start with a rectangular piece of paper Fold the paper in half lengthwise and cut a slit 1/3 of the way down the paper along the crease.

3. Fold the helicopter blades over and place a paperclip on the bottom of the helicopter

4. Hold the helicopter high and drop it to let it fly!

5. The images were collected from: http://www.origami- instructions.com/origami-helicopter.html http://www.origami- instructions.com/origami-helicopter.html This activity could be used to introduce students to the idea of flight, and could also be used to discuss the concept of air resistance.