BARR produces a larger statistically significant effect on NWEA MAP math scores in a single-school student-level randomized study, stronger for struggling students¶
Claim · All claims
Evidence · 1 study · causalr?·q4·i2medium
Currency · newest study 2023 · not yet checked against its sources · not reviewed by a person
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q4 i2 In a student-level randomized study in a large suburban high school in southern California (n = 483), BARR showed a statistically significant effect on NWEA MAP math scores (effect size = +0.33), with somewhat stronger impacts for struggling students (+0.35). → Building Assets Reducing Risks (BARR) — Evidence Rating 2023
Evidence¶
Building Assets Reducing Risks (BARR) — Evidence Rating 2023¶
Building Assets Reducing Risks (BARR) — Evidence Rating. (2023). https://www.barrcenter.org
q4 · i2 · causal · r?
A second student-level randomized study in a large suburban southern California high school found "a larger statistically significant effect on NWEA MAP math scores (effect size = +0.33)". Impacts were "somewhat stronger impacts for struggling students (+0.35)"; the sample was 52% White, 37% Hispanic, 17% English learners, 68% free or reduced-price lunch.
"A second student-level randomized study in a large suburban high school in southern California (n = 483; 52% White, 37% Hispanic, 17% English learners, 68% free or reduced-price lunch) found a larger statistically significant effect on NWEA MAP math scores (effect size = +0.33), with somewhat stronger impacts for struggling students (+0.35)."
Discussion¶
Related Claims¶
- BARR produces a small statistically significant positive effect on NWEA MAP math outcomes in a multi-site student-level randomized trial — related
- In a large suburban southern California high school, BARR produced a significant positive reading effect (+0.14), larger for struggling readers (+0.21) — related
- Two student-level randomized studies in California, Maine, and Minnesota high schools found significant positive impacts on NWEA MAP reading (average effect size +0.09) — related
- In a large multi-site cluster randomized study, BARR improved PSAT/NMSQT math scores in one cohort but the second cohort performed similarly to comparison students — related
- Zearn Math schools significantly outperformed control schools on NWEA MAP in a large Texas RCT (effect size +0.11 overall) — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
barr-suburban-rct-map-math-es-033 |
title |
BARR produces a larger statistically significant effect on NWEA MAP math scores in a single-school student-level randomized study, stronger for struggling students |
description |
BARR produces a larger statistically significant effect on NWEA MAP math scores in a single-school student-level randomized study, stronger for struggling students |
status |
review |
evidence_strength |
moderate |
newest_evidence |
2023 |
generated |
by process:wiki-ingest on 2026-10-07 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — building-assets-reducing-risks-barr-evidence-rating-2023 |
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