Give each student a topic, character from history or a region, and let them annotate their placemarks and present it. Students can then share their Google map files.
With Google Earth 5.0, you can now travel back in time to see historical imagery, dive below the surface of the ocean and record a tour of your journeys.
"Explore, create and connect with Google Earth Outreach. Explore our gallery of public-benefit maps in the Showcase. Create maps with the help of online tutorials and tools."