Many readers have found 3DVinci thru our free Teacher Guide, which I've provided to give teachers some ideas about the many ways they can use SketchUp with their students.
Of the 9 projects in the Guide, only 2 needed substantial updates - these are the projects that integrate with Google Earth. In SketchUp 8, the Earth -> SketchUp interaction is much more streamlined, with less of the back-and-forth you needed in previous versions.
The Science / Geography project for Grades 1 - 5 involves finding a volcano, building a model on or inside it, and viewing that model in Google Earth. View the PDF for this project.
The Geography / History project for Grades 10-12 involves finding a site on which to build a model, choosing what model to create, and viewing that model in Google Earth. View the PDF for this project.
Other projects in the Teacher Guide are for math, art, and general 3D design. Check it out - it's sure to spark your creativity!
Anyone can design anything in 3D! http://www.3dvinci.net/