This is a tutorial designed to show you how you can incorporate Google Earth into your classroom. Aside from the obvious geography connections you can use Google Earth to teach area, perimeter, geometry, and many other mathematical concepts.
The Scale of the Universe 2 features a huge selection of objects in the universe that are arranged according to size and scale. You can zoom-in on the image to objects as small as neutrinos and quarks or as large as planets, constellations, and galaxies. When you click on an object in The Scale of the Universe 2 a small window of information about that object pops up.
A site with geopolitical data, statistics on the human population, Earth and more. The main kind of data you can find here is population statistics of regions, countries, provinces and cities. Next to that there are some statistics on economic factors like wealth, infrastructure; statistics on natural phenomena; ....... and yet, even more."