Thematic Mapping Engine provides users with a very simple way to create Google Earth kmz files. Thematic Mapping draws on data provided by the United Nations to create maps depicting all types of development data and environmental science data. Users select a statistical indicator category, select a year or range of years, and the manner in which they would like the data displayed in Google Earth. If you're using a Windows computer you can preview your files before downloading them. Below is an image of the KMZ file I created using the Thematic Mapping Engine.
Applications for Education
Thematic Mapping could be used in Social Studies, Math, or Environmental Science courses. A map depicting GDP Per Capita would be useful in math if students are studying the differences between mean and median. The same map would also be useful in a Social Studies course where students are studying the distribution of wealth. There are a number of environmental science indicators available from Thematic Mapping one that may be particular useful for Environmental Science students is the CO2 Emissions Per Capita theme.
Thematic Mapping Engine recommends using Firefox as your web browser.