Important educational policy decisions, like whether to shorten or extend the school year, often require accurate estimates of how much students learn during the year. Yet, related research relies on a mostly untested assumption: that growth in achievement is linear throughout the entire school year. We examine this assumption using a dataset…

Using testing data from 2.1 million students in 10,000 schools in 49 states (plus D.C.), we investigate the role of remote and hybrid instruction in widening gaps in achievement by race and school poverty. We find that remote instruction was a primary driver of widening achievement gaps. Math gaps did not widen in areas that remained in-person…

States have invested heavily in improving early childhood education in hopes of improving student reading and math skills before they enter kindergarten. However, there is limited national data from later than 2010 on children's skills in these areas at kindergarten entry, so it is difficult for educators and policy makers to ascertain whether…

New research, using data from 7 million students in grades 3-8 in 25,000 schools who took MAP Growth reading and mathematics assessments between 2020-21 and fall 2022, continues NWEA's ongoing research agenda examining how the COVID-19 pandemic has affected student achievement in reading and math. At the start of the 2022-23 school year, we…

In our report, "Learning during COVID-19: Initial findings on students' reading and math achievement and growth," we examine how school shutdowns impacted student achievement at the start of the 2020-21 school year. Using data from schools all over the country, we've built these visualizations to explore three key questions: (1) How have…

The impact of the COVID-19 pandemic continues to overwhelm the functioning and outcomes of educational systems throughout the nation. The public education system is under particular scrutiny given that students, families, and educators are under considerable stress to maintain academic progress. Since the beginning of the crisis, school-systems…

Evaluators report effects of education initiatives as standardized effect sizes, a scale that has merits but obscures interpretation of the effects' practical importance. Consequently, educators and policymakers seek more readily interpretable translations of evaluation results. One popular metric is the number of years of learning necessary to…