Map-a-Planet
Allows users to customize and download their own image maps of the Moon, Mars, Venus, and other planets and moons. From the USGS Astrogeology Research Program.
pdsmaps.wr.usgs.gov
Planetary Geology Teacher's Guide
PDF document from NASA's Education Division with classroom activities in physical and earth sciences for grades 5 and up.
spacelink.nasa.gov/Instructional.Materials/NASA.Educational.Products/Planet...
USGS Astrogeology: Gazetteer of Planetary Nomenclature
Provides IAU rules and conventions for naming planets as well as accepted names for some planets and systems including mercury, mars, and the moon.
planetarynames.wr.usgs.gov
Geology of Mars [read review]
Learn about the six geological processes that are either currently operating on Mars or have operated during Martian history.
www.lukew.com/marsgeo