Conclusion
Congratulations! You have hopefully learned a lot of things you didn't know before. America is made up of so many people from so many different places that we could spend years studying them and visiting their original homes.
You have not only learned a lot, you have helped educate your classmates. Maybe you have motivated someonbe to research his or her own history a little more deeply, maybe you have inspired someone to plan a trip abroad in a few years. Mostly, you have helped your classmates realize that we are all so very different, and that part of living in America is celebrating those differences.
Thank you for a job well done.