Each state and jurisdiction that participated in the National Assessment of Educational Progress (NAEP) 2013 Grade 12 Reading and Mathematics State Pilot assessment receives a one-page snapshot report that presents key findings and trends in a condensed format. This report presents the results for Illinois's 2013 student achievement in mathematics. In 2013, the average score of twelfth-grade students in Illinois was 154. This was not significantly different from the average score of 152 for public school students in the nation. The average score for students in Illinois in 2013 (154) was not significantly different from their average score in 2009 (154). The score gap between higher performing students in Illinois (those at the 75th percentile) and lower performing students (those at the 25th percentile) was 47 points in 2013. This performance gap was not significantly different from that in 2009 (45 points). The percentage of students in Illinois who performed at or above the NAEP "Proficient" level was 27 percent in 2013. This percentage was not significantly different from that in 2009 (26 percent). The percentage of students in Illinois who performed at or above the NAEP "Basic" level was 65 percent in 2013. This percentage was not significantly different from that in 2009 (67 percent). [Access the complete 2013 results from the twelfth-grade pilot program in reading and mathematics via the online Nation's Report Card: http://nationsreportcard.gov/reading_math_g12_2013/#/student-progress.]