Did you know that the United States has the highest immigrant population in the world? You may have heard the phrase, We are a nation built by immigrants, but that saying doesn't tell the full story. Students will examine this popular phrase by retracing the immigrant journey within the United States and investigating the concept of cultural assimilation. What does it mean to be American? As the United States continues to grow and change, students can become better-informed citizens by looking at the immigrant experience and understanding the roots of American identities.