This report focuses on the performance of fourth- and eighth-grade students in Puerto Rico in various mathematics content areas on the 2007 National Assessment of Educational Progress (NAEP) in mathematics. Average question scores are presented for all students and for male and female students in Puerto Rico for mathematics overall and for five subscales that represent mathematics content areas. Average question scores for public school students in the nation (excluding Puerto Rico) are shown for comparison. In all cases, students in Puerto Rico had lower scores than the nation. Numerous sample questions are presented for each content area for each grade, along with response percentages for Puerto Rico and the nation.