About Us

US Academic Scores is an independent education data website focused on how students in the United States perform on major national and international assessments. The site organizes official results from PISA, TIMSS, PIRLS, NAEP and ICILS into accessible tables, charts and subject-specific data pages.

The site focuses specifically on assessment results and the measurements needed to interpret them. Coverage includes current scores, historical trends, grade-level results, international comparisons, state results where available, proficiency levels, achievement benchmarks and differences between student groups.

Each assessment is treated according to its own design. PISA results for 15-year-old students are not treated as interchangeable with grade-based NAEP or TIMSS results, and separate assessment domains are not combined into artificial overall scores.

US Academic Scores prioritizes original assessment organizations and official government education sources. Depending on the assessment, primary sources include the National Center for Education Statistics, the OECD, the International Association for the Evaluation of Educational Achievement and the Nation’s Report Card.

Published values are checked against the relevant assessment cycle, subject, grade or age group, reporting population and measurement definition. When official results include statistical significance tests, standard errors, suppression rules or technical cautions, those details are considered when describing differences between scores.

A score without its measurement context can be misleading. Data pages therefore distinguish between numerical differences and statistically measurable differences, current-cycle results and long-term trends, and separate student populations or assessment domains.

Charts are used to make patterns easier to see, while the underlying values remain available in HTML data tables wherever practical. Tables are intended to remain useful even when interactive chart features are unavailable.

Interpretation sections focus on what multiple data points show together rather than simply repeating the highest, lowest or most recent values. They do not assign causes to score changes unless the underlying evidence supports a causal conclusion.

International assessment results are not treated as simple league tables when sampling uncertainty affects the ordering of participating systems. A numerically higher score does not automatically mean that one education system performed measurably better than another.

State and student-group comparisons follow the same principle. Rankings, when shown, refer only to the stated indicator, assessment, grade, subject and reporting year. They should not be interpreted as a general ranking of the quality of a state or education system.

Assessment pages are updated as new official cycles, revised tables or technical documentation become available. Source years are stated so that the publication date of a page is not confused with the year in which students were assessed.

If an official source revises a value, the revised official figure takes priority. Material corrections should be reflected in the affected data page rather than preserving an outdated value for consistency with an earlier version.

US Academic Scores is designed as a factual education statistics resource. The site does not rate individual students, schools or teachers and does not use assessment results to make unsupported judgments about the overall quality of an education system.

Published analysis is limited to what the underlying data can support. Methodological limitations, unusual reporting conditions and comparability issues are included when they materially affect how a result should be read.