Skip to main content
OpenSchoolData

Standardized Testing

Uniform assessments administered under consistent conditions to all students in a grade level, used to measure academic achievement and compare performance across schools, districts, and states.

Reviewed by OpenSchoolData Editorial Team

How It Works

Standardized testing is the foundation of school accountability in the United States. Under the Every Student Succeeds Act (ESSA), all states must test students in reading and math annually in grades 3 through 8 and once in high school, plus science testing at least once in each grade span. These tests produce the proficiency data that OpenSchoolData displays from EDFacts. Common state assessments include Smarter Balanced (used by about 15 states), PARCC-descended tests, and state-developed assessments. Each state sets its own cut scores that define proficiency levels, typically four tiers from "below basic" to "advanced." Critics of standardized testing argue that tests measure socioeconomic status more than school quality, that teaching to the test narrows the curriculum, and that a single test cannot capture the full range of student learning. Supporters counter that without standardized data, there is no way to identify underperforming schools or ensure accountability for student outcomes. The testing debate remains one of the most contentious issues in American education, but standardized test data remains the most comprehensive and comparable measure of academic performance across the country.

Related Terms

  • Proficiency Rate, The percentage of students at a school who meet or exceed grade-level standards on state-mandated standardized tests in reading and math.
  • Common Core State Standards, A set of academic standards in mathematics and English language arts that define what students should know and be able to do at each grade level, adopted by most U.S. states.
  • School Accountability, The system by which schools and districts are held responsible for student outcomes, including state ratings, improvement plans, and potential interventions for chronically low-performing schools.
  • National Center for Education Statistics (NCES), The primary federal agency for collecting, analyzing, and reporting education data in the United States, housed within the Institute of Education Sciences at the U.S. Department of Education.

Explore School Data

Search SchoolsMost Improved SchoolsAll Glossary Terms

Real federal data: NCES CCD enrollment (2022), EDFacts proficiency rates (2020, district-level), EDFacts graduation rates (2019, district-level).

About This Definition

This definition is part of the OpenSchoolData Education Glossary, 33 terms explaining how school performance data works in the United States. All definitions are written in plain language for parents, educators, journalists, and researchers.

Standardized Testing is one of the U.S. K-12 school outcomes and enrollment concepts that recurs across this site. The definition above is the technical answer; the paragraphs below add the practical context for how the concept connects to the NCES Common Core of Data and EDFacts data behind every per-entity page on the site.

In the NCES Common Core of Data and EDFacts data, this concept shapes one or more of the fields that drive the per-entity grades and rankings on this site. The methodology page describes which fields feed into which output; this glossary entry documents the underlying term.

Source: NCES Common Core of Data, 2026.