Zip Lookup is an interesting use of the ESRI mapping platform. The map allows you to enter any US zip code to discover demographic data about that area. Whenever I see something like this I am skeptical of how well it will work for very small towns like the one that I live in (South Paris, Maine). I was pleasantly surprised to find that Zip Lookup was quite accurate.
The site will give you graphs of the demographic data for a zip code. It will also give you a little blurb about what the data graphs mean in terms of the characteristics of the town or city represented by the data.
Applications for Education
Zip Lookup could be a neat tool for students to use to discover how people in other parts of their counties, states, or country live. A short research activity based on Zip Lookup would be to investigate what draws people of a particular demographic to an area.