I was in a second grade classroom a few years ago working with students on map skills. When I shared Google earth, there were gasps of surprise and delight. It was a great moment. We looked at the school and viewed in street view. Every child wanted to see where they lived. Unfortunately, I had only 30 minutes that day to share this tool and model its use for the teacher. I moved to another school prior to discovering if the teacher had added Google Earth to her "tool box".
Google has provided resources to assist folks in using Google Earth. One resource is the Google Earth User Guide. This guide is in pdf format and Drive users will be happy that it automatically opens in Google Docs where you can refer to it as needed. I love the way the author describes Google Earth as a window to anywhere on the planet. Another resource is a set of tutorials that will help you to become a "Google mapping expert".
Are you using Google Earth? Have you used Jerome Burg's Google Lit Trips?