Ask Polaris is a site set up by a variety of Aerospace organizations, including AIAA, AIA, and FAA. The site is a great resource for students who are interested in Aerospace Engineering and also has information on engineering in general. There is information on college selection, college admissions, high school preparation, and career guidance. There is also a section for parents.
Each of the cooperating organizations also have educational sites.
This site is a must see for any student interested in engineering, especially in the aerospace field.
(I'm a little partial to this as my undergrad degree is in aerospace engineering and I worked as an aerospace engineer for 10 years before becoming an educator.)