The New York Times recently published a series of interactive charts showing how Americans have moved between states since 1900.  As NYT's Gregor Aisch and Robert Gebeloff explain, "the charts show striking patterns for many states: You can trace the rise of migrant and immigrant populations all along the Southwest, particularly in Texas and Arizona; the influx of New Yorkers and other Northeasterners into Florida starting in the 1970s; and the growth in the Southern share of the Illinois population during the Great Migration."

http://www.nytimes.com/interactive/2014/08/13/upshot/where-people-in-each-state-were-born.html?rref=upshot&abt=0002&abg=1#California

With this new map, we can see at a glance where the people living in a state were born (larger shapes mean a group makes up a larger share of the population) in 1900, 1950, and 2012.  Click on the map to zoom in, or hover over a shape to see more detailed information.

To access the interactive version of this map, go to: http://www.nytimes.com/2014/08/16/upshot/mapping-migration-in-the-united-states-since-1900.html?_r=1&abt=0002&abg=1

Read more:
http://www.nytimes.com/2014/08/16/upshot/mapping-migration-in-the-united-states-since-1900.html?_r=1&abt=0002&abg=1
http://www.nytimes.com/2014/08/15/upshot/the-california-exodus.html?rref=upshot&abt=0002&abg=1
http://www.nytimes.com/interactive/2014/08/13/upshot/where-people-in-each-state-were-born.html?rref=upshot&abt=0002&abg=1

TeachingwithData.org resources:
State to State Migration (http://www.teachingwithdata.org/resource/3852)
Census Flows Mapper (http://www.teachingwithdata.org/resource/3844)
Net Migration Statistics (http://www.teachingwithdata.org/resource/2980)
Percentage of the Labour Force 15 Years and Over, Who Lived in a Different Province or Territory 5 Years Ago by 2006 Census Divisions (CDs) (http://www.teachingwithdata.org/resource/2937)
"Global Migration Patterns" Lesson Plan (http://www.teachingwithdata.org/resource/2858)
Residential Mobility and Migration (http://www.teachingwithdata.org/resource/3120)
Migration Service Learning Plan (http://www.teachingwithdata.org/resource/3291)