The average mathematics score for fourth-grade students in 2017 was not significantly different compared to 2015, the previous assessment year. The average mathematics score for fourth-grade students increased by 27 points compared to the first assessment year in 1990. Average scores are reported on a NAEP mathematics scale at grade 4 that ranges from 0–500.

The chart below shows the trend in average mathematics scores beginning in 1992 and the cut scores indicating the lower end of the score range for each NAEP achievement level: Basic, Proficient, and Advanced. Read a description of each achievement level by clicking the question mark icons. Read more about NAEP achievement levels and how they are set. Please note, achievement levels are to be used on a trial basis and should be interpreted and used with caution.

NAEP reports scores at five selected percentiles to show the progress made by lower- (10th and 25th percentiles), middle- (50th percentile), and higher- (75th and 90th percentiles) performing students. Compared to 2015, the 2017 mathematics scores were lower at the 10th and 25th percentiles. Also in 2017, mathematics scores were higher at all five selected percentiles compared to 1990, the first assessment year.