The Learning Technologies Project (LTP) of the National Aeronautics and Space Administration (NASA) Glenn Research Center provides the Beginner's Guide to Aeronautics Website. This site offers an introduction to the fundamentals of aerodynamics and propulsion. Sections included at the site are Airplanes, Lift, Air, Gliders, Wind Tunnel, Curve Ball, and Forces. Most of the sections include a summary of the topic supplemented with slides, links, references, and interactive computer animations. This is an excellent resource and is well worth a visit.