Register now for FREE unlimited access to Reuters.com RegisterIn reading, scores declined for most jurisdictions, though the decreases were not as dramatic as those in math.
Eighth-graders' math proficiency scores dropped by seven percentage points compared with 2019, results showed.
The test is considered to be the first comprehensive, nationwide account of student performance since the onset of the pandemic.
Biden's education secretary, Miguel Cardona, described the test results as "appalling" but said they were a call for action.
Among fourth graders, white students saw a three-point decrease in math, while Black and Hispanic students each saw decreases of seven points, the results showed.