Larry Ferlazzo 
Here’s how the National Museum of American History describes Becoming US:
Becoming US is a new educational resource for high school teachers and students to learn immigration and migration history in a more accurate and inclusive way.
There are versions in English and in Spanish.
I’m adding it to:
The Best Resources For Developing Lessons On The Question, “Who Is An American?”
The Best Websites For Teaching & Learning About U.S. History
The Best Sites For Learning About Immigration In The United States
Dialed BMX StuntShow 
TechPlanet 
The Independent - World 
eSchool News 
Public Radio International 
The Washington Times - World