A very large group of private non-profits and public agencies began Immigrant Heritage Month in 2013.
For this year, they’ve begun an “I Am An Immigrant” campaign, which you can read about at NBC News and learn by watching this video:
This particular new campaign encourages people to post images of themselves online saying they are an immigrant, so that may not work for most teachers and classes.
However, the idea of Immigrant Heritage Month might work as a jumping-off point to discuss immigration issues.
You can find additional resources at The Best Sites For Learning About Immigration In The United States.