“Results from the 2015 NAEP mathematics and reading assessments are available. Learn about the findings and how to explore the report online. The results from the 2015 mathematics and reading assessments are based on representative samples of approximately 279,000 fourth-graders and 273,000 eighth-graders. Results are reported for public and private school students in the nation, and for public school students in all 50 states, the District of Columbia, and Department of Defense schools. In addition, results are available for 21 participating urban districts.”