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…

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…

These are the appendixes for the report, "Trends and Gaps in Reading Achievement across Kindergarten and Grade 1 in Two Illinois School Districts." This study examined reading achievement data for kindergarten and grade 1 students in two districts in Illinois: District U-46 (Elgin Area Schools) and District 186 (Springfield Public…

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, Main-NAEP, TIMSS, and PISA that are psychometrically linked over time, we trace trends in achievement for U.S. student cohorts born between 1954 and 2001. Achievement…

Each year the National Reference Test (NRT) reports the proportions of students achieving at or above three key GCSE grades in English and mathematics. The NRT is therefore uniquely placed as a Key Stage 4 assessment which compares performance directly at ability level, to contribute to the evidence on the impact of disruption to education due to…

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…

The purpose of this technical appendix is to share detailed results and to more fully describe the sample and methods used in the research included in the brief, "Recovery Still Elusive: 2023-24 Student Achievement Highlights Persistent Achievement Gaps and a Long Road Ahead." The authors investigated three main research questions in…

In every classroom across our great state--from Monroe to Manistee and Mt. Pleasant to Marquette--every Michigan student deserves access and opportunity to the educational resources and support to realize a bright future. Yet for too long, Michigan's education system has served as an engine of inequality when it should be providing opportunities…

"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…

As is the case in most OECD countries, boys in Norway are more likely to have lower levels of academic achievement and attainment than girls. While this phenomenon is not recent, it has become increasingly pronounced in recent years and, as a result, is attracting considerable attention from policy-makers in many countries. This paper develops…

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…

The goal of HISD [Houston Independent School District] prekindergarten programs is to offer the youngest learners strong foundations built on solid concept, as well as individual and group discovery. The program curriculum focuses on beginning literacy, numeracy, social emotional development as well as supporting the individual linguistic and…

The Houston Independent School District (HISD) offers two primary bilingual programs for Spanish-speaking English learners (ELs). EL students in the district's two main bilingual programs (Transitional and Dual Language) are instructed in both English and Spanish. The relative amount of instruction in each language depends on both program and…

We estimate racial/ethnic achievement gaps in several hundred metropolitan areas and several thousand school districts in the United States using the results of roughly 200 million standardized math and reading tests administered to public school students from 2009-2013. We show that achievement gaps vary substantially, ranging from nearly 0 in…

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…