This site from the US Census Bureau is another recent example of its ongoing effort to raise civic consciousness concerning the history and value of the decennial headcount. The site asks students to examine online documents from the 1880 and 1900 census to track the geographic and, to some extent, personal changes in the Wilder family. Questions encourage students to use critical thinking to explain discrepancies in census data as well as to consider the sort of historical hypotheses that might be drawn from the data and commentary in the Census. The materials offered are thoughtful, but somewhat sketchy, so teachers will probably want to work out the instructional details themselves before presenting the site to students.