A Journey into the Unknown http://library.thinkquest.org/12272/pop
A collection of web pages which detail the realm outside of our world: Outer space. These pages are designed primarily for teaching or as reference resources, but also contain some areas for entertainment.
Astronomy In Your Hands http://www.astronomyinyourhands.compop
Contains a collection of hands-on astronomy activities for classroom and home. A feature is the downloadable star wheel with a version available for every latitude on Earth.
ESO Outreach http://www.eso.org/outreach/
The European Southern Observatory's program for student and kids. Includes events, science shows and multimedia material.
Hands-On Universe (HOU) http://www.handsonuniverse.org/
HOU participants around the world request observations from an automated telescope, download images from a large image archive, and analyze them with the aid of user-friendly image processing software.