I found this site via the Google Certified Teacher’s Google Group discussing Google Earth. It got me all of a fizzle about using this instructional layer KMZ file with pupils in Maths or Geography next year as part of ICT in Subjects.
You can download the Google Earth file here. The first link in the list contains the next ten tutorials. The last one you have to download separately. If you have never downloaded a KMZ file before then watch the video below (<2 minutes) – it’s late so forgive the narrator whomever he may be. :/