From the "Journey to Planet Earth" series, PBS takes a look at the world's exploding urban population. Includes video clips and educational resources.

Learning resource using primary sources in which students study de facto segregation in the North following the Civil War and examine how African-Americans responded to segregation and racism compared to the South.

Gives a description of political machines and their three parts that make up the machines. Also discusses what these political machines did and talks of their decline in the 20th century.

Brief historical description of the growth of corporations and trusts at the end of the 1800s and how that trend led to the growth of urban areas to house this corporate movement.

Using cartograms, compare the GDP's of rural and urban areas in the Unites States. View the 10 largest metro areas by GDP and see how the US compares to the United Kingdom in terms of GDP.