This is an excellent interactive map that allows the user to explore the various neighborhoods of New York City and analyze the housing market for a particular income bracket. I've discovered that trying to purchase a home or rent an apartment can be one of the best hands-on lessons in urban social geography. I envision a dynamic project that could be designed around this resource where several members of a group are given different demographic characteristics (for example: single income, 2 married adults, 3 children under 10 years of age) and income levels and a fixed workplace. Where would you live? What determines your choices? What would your personal geographies look like?