NASA
Nasa: The Space Place
This site from NASA's Space Place is geared towards early elementary learners. It offers detailed instructions for crafts and activities related to space, games and a teacher resource area. Students can also ask an expert at this site.
NASA
Nasa Star Child: Mercury
Provides good information about Mercury and is a good starting point for information about the planet along with pictures and audio. Links to a simple fact table, puzzle, glossary, and more detailed information.
NASA
Nasa Space Place: Asteroid or Meteor: What's the Difference?
Learn the difference between asteroids and comets, meteoroids and meteorites, and more!