The recent release of the test scores of seniors on the National Assessment of Educational Progress reported that low-performing students suffered the biggest declines.

“Much like their 4th and 8th grade peers, high school seniors have lost ground in math over the last two years, according to the most recent scores on a national achievement test.

“In reading, 12th grade scores remained flat, continuing a trend since 2009.

“Perhaps the most striking detail in the test data, though, is that the lowest achievers showed large score drops in both math and reading. Between 2013 and 2015, students at or below the 10th percentile in reading went down an average of 6 points on the National Assessment for Educational Progress—the largest drop in a two-year period since 1994. The high achievers, on the other hand—those at or above the 90th percentile—did significantly better in reading, gaining two points, on average, while staying stagnant in math.”