Schools are not static entities--reforms are enacted, curriculums change, new principals and teachers arrive and others leave, and, importantly, students exit and enter the school system. These students may be graduating or reaching a terminal grade, beginning school, entering from local private or parochial schools, moving from another district, or emigrating from another country. This brief focuses on the latter group: the immigrant students in New York City (NYC) public elementary and middle schools over the past decade. As the largest and most diverse school system in the country, it is particularly important that education professionals in NYC have a comprehensive understanding of their students and how they are changing. This report presents a statistical portrait of the demographic characteristics and educational experiences of immigrant students in NYC's elementary and middle school grades (1st-8th grades) during the 2008-09 academic year. It documents the size and diversity of the immigrant population; compares differences between the native-born and immigrant students across a series of socioeconomic, demographic, and academic performance variables; examines differences within the immigrant population related to time in the U.S. and differences in region of origin; and notes similarities and differences between the foreign-born student population in 2009 compared to 2000. Two appendices are included: (1) Differences in School Performance of Region Groups within Poverty, Racial/Ethnic, and English Proficiency Groups [Tables]; and (2) Countries Included in Regional Groupings.