>The latest release comes from NAEP’s 2020 assessment of long-term trends, which was administered by the National Center for Education Statistics to nine- and 13-year-olds before COVID-19 first shuttered schools last spring.

And, as the article notes, this test could prove useful in testing against later COVID related effects:

> The long-term assessment is a crucial piece of data for another reason: It was administered to students between October 2019 and March 2020, making it a final snapshot of academic trends before the emergence of COVID-19.