"Excellence gaps" are the disparities in advanced academic performance that exist between student groups. These gaps have important implications for both academic equity and American economic competitiveness, as the most lucrative jobs often go to those who perform at the highest levels. Although considerable work has evaluated how and…

Nearly 1 in 5 U.S. students attend rural schools. Researchers report that at least half of public schools are rural in 12 states (i.e., Montana, South Dakota, Vermont, North Dakota, Maine, Alaska, Oklahoma, Nebraska, Wyoming, New Hampshire, Iowa, and Mississippi) (Showalter et al., 2019). Providing quality education to all rural students is a…

This Statistics in Brief (SiB) uses data from the 2011 and 2019 Trends in International Mathematics and Science Study (TIMSS), and explores how achievement gaps between high- and low-performing 4th- and 8th-grade students in the U.S. and other education systems have changed over time. Achievement gaps are defined as the differences in scores…

The purpose of this technical appendix is to share more detailed results and to describe more fully the sample and methods used in the research included in the brief, "The Widening Achievement Divide during COVID-19." The authors investigated two main research questions in this brief: (1) To what degree have students' reading and math…

Tiebout theorizes that local public services are provided more efficiently if costs are paid out of local revenues rather than by inter-governmental grants. But if local politics is not as pluralistic as Dahl has argued, citizens of higher socio-economic status will exercise greater influence, resulting in higher inequalities in service provision.…

The purpose of this technical appendix is to share detailed results and more fully describe the sample and methods used to produce the research brief, "COVID's Impact on Science Achievement: Trends from 2019 through 2024. We investigated three main research questions in this brief: 1) How did science achievement in 2021 and 2024 compare to…

Well over six decades after the Supreme Court declared "separate but equal" schools to be unconstitutional in "Brown v. Board of Education," schools remain heavily segregated by race and ethnicity. The lack of progress in integrating schools: (1) depresses education outcomes for black students; (2) widens performance gaps…

From 2010 onwards, most US states have aligned their education standards by adopting the Common Core State Standards (CCSS) for math and English Language Arts. The CCSS did not target other subjects such as science and social studies. We estimate spillovers of the CCSS on student achievement in non-targeted subjects in models with state and year…

This is the technical index for the research brief "Education's Long COVID: 2022-23 Achievement Data Reveal Stalled Progress toward Pandemic Recovery." Using data from 6.7 million U.S. public school students currently in grades 3-8, the study examined academic gains in the 2022-23 school year relative to pre-pandemic years. It also…

In today's economy, preparation for career or college is essential. Yet too few students graduate with the knowledge or skills to directly enter college or a career. The time students spend in on-the-job training or catching up in remedial courses cost students and their families more both in time and money. Many of these students are caught off…

The International Association for the Evaluation of Educational Achievement's (IEA) mission is to enhance knowledge about education systems worldwide and to provide high-quality data that will support education reform and lead to better teaching and learning in schools. In pursuit of this aim, it conducts and reports on major studies of student…

This report examines and explains the most recent achievement results for New York City and New York State students in district and charter schools, and to put New York City's achievement levels in context. The New York City public school system is the largest in the country, with more than 1 million students in grades prekindergarten through 12…

Rising inequality in the United States has raised concerns about potentially widening gaps in educational achievement by socio-economic status (SES). Using assessments from LTT-NAEP [Long-Term Trend assessment administered by the National Assessment of Educational Progress], Main-NAEP, TIMSS [Trends in International Mathematics and Science Study],…

The research featured in this paper is part of the CORE-PACE Research Partnership, which is focused on producing research that informs continuous improvement in the CORE districts as well as policy and practice in California and beyond. In this report, the authors used data from multiple interim assessments to examine how the rate of student…

Concerns about the breadth of the U.S. income distribution and limited intergenerational mobility have led to a focus on educational achievement gaps by socio-economic status (SES). Using intertemporally linked assessments from NAEP [National Assessment of Educational Progress], TIMSS [Trends in International Mathematics and Science Survey], and…