Data.gov is a source of raw data sets generated by the various agencies and departments of the US government. Some of the agencies providing data on Data.gov that may be of particular interest to educators are the National Center for Education Statistics, National Science Foundation, and the US Census Bureau. Data.gov is still in development and search options aren’t as polished as I would like, but Data.gov is still a potentially useful database.

Applications for Education
Data.gov could be useful in any high school content area that teaches statistical analysis. In particular, I can see environmental data being used in an Earth Science classroom and data from the Economic Research Service could be used in an economics or business course.