The purpose of this activity is to learn how paper airplanes fly. 1. Watch the video . 2. Follow the directions to build a paper airplane. Take a . 3. Test your airplane 5 times. 4. Measure the distance your paper airplane flies. Take s. 5. Click . 6. Bring in your s. 7. a summary of this activity. Use some of the vocabulary words that you learned (force, thrust, lift).