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PBS
Pbs Teachers: Scientific American: Flying Free: Make a Wind Tunnel
Investigate the science of flight, the tilt or angle of attack of a wing's surface and the effect of control surfaces. Construct a model of an open jet wind tunnel using a household desk fan to produce a flow of air.
MadSci Network
Mad Scientist Network: How Do Planes Fly Upside Down?
Question and answer regarding the physics principles that apply to a plane flying upside down.
NASA
Nasa: Beginner's Guide to Aerodynamics
Includes exhaustive information and a wealth of activities pertaining to aerodynamics and the physics of flight.