18 Google Earth & Maps Lessons for K-12. In response to that post I received a bunch of requests for more information about Google Earth and Google Maps including how to create placemarks and tours. I've shared these directions in the past, but it's worth sharing them again for folks who are thinking about trying a Google Earth or Google Maps-based lesson in their classrooms.
You may also find this playlist of Google Earth videos useful.
Finally, last fall Jerome Burg and Thomas Petra hosted a Google+ Hangout about using Google Earth in education. A recording of that Hangout is available here.