Claims

Grade 8 mathematics scores in 2019 decreased at the 10th and 25th percentiles compared to 2017, while the average was 1 point higher than 2017 and 19 points higher than 1990

Claim · All claims
Evidence · 1 study · associational r? · q2
Currency · newest study 2020 · not yet checked against its sources · not reviewed by a person · overdue for a recheck since 2025: baselines and conditions change

Subclaims

Reading the evidence codes

q is the design tier, i the impact, n the sample, and the kind with its r the rigour judged within that kind: what each code means.

This claim: no standardized effect is recorded in observations/ for it yet, so no benchmark reading is possible.

q2 i? Grade 8 mathematics scores decreased at the 10th and 25th percentiles compared to 2017, even though the average score rose 1 point versus 2017 and 19 points versus 1990. → Results from the 2019 Mathematics and Reading Assessments 2020

Evidence

Results from the 2019 Mathematics and Reading Assessments 2020

Results from the 2019 Mathematics and Reading Assessments. (2020). U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics. https://www.nationsreportcard.gov

q2 · i? · associational · r?

The NAEP 2019 results infographic reports grade 8 mathematics trends, printing "Decreases at the 10th and 25th percentiles" alongside a 1-point average gain versus 2017 and a 19-point gain versus 1990. No effect sizes are reported.

"Grade 8 MATHEMATICS Decreases at the 10th and 25th percentiles"

Discussion

Page metadata
Field Value
type claim
id naep-2019-grade-8-math-lower-percentiles
title Grade 8 mathematics scores in 2019 decreased at the 10th and 25th percentiles compared to 2017, while the average was 1 point higher than 2017 and 19 points higher than 1990
description Grade 8 mathematics scores in 2019 decreased at the 10th and 25th percentiles compared to 2017, while the average was 1 point higher than 2017 and 19 points higher than 1990
status review
evidence_strength moderate
newest_evidence 2020
recheck_by 2025
generated by process:wiki-ingest on 2026-10-13
trust unverified — no one has confirmed this page's content
sources 1 — results-from-the-2019-mathematics-and-reading-assessments-2020

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