Have a look at the latest geo-browser coming from ESRI in August. It updates and enhances the existing ArcGIS Explorer to new heights! I think this tool has some great applications for K-12 education. It goes beyond Google Earth's capabilities so that students can do some more analysis of map data and content. COOL tools are a good think!
http://www.esri.com/events/uc/images/plenary/6arcgis-explorer.html
I'm looking forward to creating some great curricular resources with it! Also check out the other news from the ESRI International User Conference Plenary at http://www.esri.com/events/uc/agenda/plenary.html.
It's always fun learning about new stuff when we make the trek to San Diego each summer! Thanks ESRI!
