This one-page report presents overall results, achievement level percentages and average score results, scores at selected percentiles, average scores for district and large cities, results for student groups (school race, gender, and eligibility for National School Lunch Program) in 2011, and score gaps for student groups. In 2011, the average score of eighth-grade students in Chicago was 270. This was lower than the average score of 274 for public school students in large cities. The average score for students in Chicago in 2011 (270) was higher than their average score in 2009 (264) and in 2003 (254). In 2011, the score gap between students in Chicago at the 75th percentile and students at the 25th percentile was 45 points. This performance gap was not significantly different from that of 2003 (45 points). The percentage of students in Chicago who performed at or above the NAEP "Proficient" level was 20 percent in 2011. This percentage was greater than that in 2009 (15 percent) and in 2003 (9 percent). The percentage of students in Chicago who performed at or above the NAEP "Basic" level was 60 percent in 2011. This percentage was greater than that in 2009 (51 percent) and in 2003 (42 percent). [For the main report, "The Nation's Report Card: Mathematics 2011. Trial Urban District Assessment Results at Grades 4 and 8. NCES 2012-452," see ED527170.]