Most storms are exciting, but hurricanes are very scary. The wind is so strong that roofs of houses lift off and blow away. Do you want to help to prevent this? You can. Hint: first study how an airplane wing "lifts" a flying plane. What is an "airfoil?"    Grade School: Out of shoeboxes, you can make model houses which have removable roofs of different slants ("pitches"). Then, using a fan, you can try to blow the roofs off. Which pitches are easiest to blow off, and which are the resistant to the wind? The webpage given below* tells you how you might make your "houses."    Middle School: You need a more difficult a project, determine just how much "lift" the fan's strongest wind has on the various roofs. Each house can be placed on a scale, and the fan turned on. Measure how much lighter the houses get. You should also have the wind strike the house from various angles, and then make graphs of your results.    High School: The younger students were looking at the problem like an architect designing a new home. But what about "retrofitting" existing homes to make their roofs more wind resistant? You might make models of your own homes and test them for "lift" as the middle schoolers would do, but then you must make changes to your house that would cut the lift at least by half. Changing a whole roof is very expensive. Are there less expensive ways to "foil the airfoil"? * For more details: www.science-projects.com/Roofs.htm