My favorite classes in school, even up through college, were those that we had a real community going. These were usually conducted by my favorite teachers, who felt that a classroom was sort of like a family. They made time to make us all feel welcome, safe, and important.
People Bingo is not only a fun activity but also a great way to get students up and moving during the first week of school to get to know one another! I use this game to help build my classroom community.