This site gives does a great job dividing the interest in satellites between current use and future use, explaining how satellites are expected to change to fit, or better meet, our needs. This site also explains specific constellations and orbits in use.

This site is very user friendly. It is worded perfectly for the specified age group and has animations exhibiting the different types of orbits from different perspectives. Not only does this site describe what satellites do but also shows photos taken from satellites as well as prospects for future use. There are also links which take the user to pages discribing satellites in current use and ones that will be made in the near future.