immigration USA - links
http://www.digitalhistory.uh.edu/historyonline/ethnic_am.cfm
http://www.spartacus.schoolnet.co.uk/USAimmigration.htm
http://teacher.scholastic.com/ACTIVITIES/IMMIGRATION/index.htm
http://www.nytimes.com/interactive/2009/03/10/us/20090310-immigration-explorer.html
as well as p.18/19 in your textbook.
