The 14th Amendment defines the requrements for US Citizenship. Every person born in the United States is a citizen. An immigrant can become a naturalized citizen.
September 17th is Constitution Day and Citizenship Day. In preparation, here are some practice interviews for each section of the N-400.
N400 Intro
N400 Part 1: Name
N400 Part 2 & 3: Eligibility and Personal Info
N400 Part 4 & 5: Address and Criminal Record Info
N400 Part 6: Residence and Employment History
N400 Part 6: Employment History (only)
N400 Part 7: Travel
N400 Part 8: Marital History
N400 Part 9: Children
N400 Part 10A: General Questions
N400 Part 10BC: Affiliations
N400 Part 10D: Moral Character
N400 Part 10EFG: Deportation and Military Service
N400 Part 10H: Oath Requirements
Check out the National Constitution Center for more ideas about how to celebrate Constitution Day and Citizenship Day.