BARR produces a small statistically significant positive effect on NWEA MAP math outcomes in a multi-site student-level randomized trial¶
Claim · All claims
Evidence · 1 study · causalr?·q4
Currency · newest study 2023 · not yet checked against its sources · not reviewed by a person
Subclaims¶
Reading the evidence codes
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q4 i? In a multi-site student-level randomized trial across six high schools (n = 1,631), BARR showed a small but statistically significant positive impact on NWEA MAP math outcomes (effect size = +0.08). → 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 · i? · causal · r?
A multi-site student-level randomized trial in six high schools in Maine, California, and Minnesota found "a small but statistically significant positive impact on math outcomes measured by NWEA MAP (effect size = +0.08)". The sample was 67% African American, 10% English learners, 13% special education, 72% free or reduced-price lunch.
"A multi-site student-level randomized trial conducted in six high schools in Maine, California, and Minnesota (n = 1,631; 67% African American, 10% English learners, 13% special education, 72% free or reduced-price lunch) found a small but statistically significant positive impact on math outcomes measured by NWEA MAP (effect size = +0.08)."
Discussion¶
Related Claims¶
- 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
- BARR produces a larger statistically significant effect on NWEA MAP math scores in a single-school student-level randomized study, stronger for struggling students — 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
- A large multi-site cluster randomized study found a positive PSAT/NMSQT reading effect in one cohort (+0.13) but a smaller effect in a second cohort (+0.03) — related
- BARR improves reading achievement across grades 7–12 with an average effect size of +0.08 across three randomized studies — 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
- PLC at Work has a statistically significant positive effect on state-administered ACT Aspire math achievement scores (effect size = +0.08) after less than two years of implementation — related
- A multi-site randomized controlled trial found Woot Math's adaptivity contributed significant effects in learning and retention
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
barr-multisite-rct-map-math-es-008 |
title |
BARR produces a small statistically significant positive effect on NWEA MAP math outcomes in a multi-site student-level randomized trial |
description |
BARR produces a small statistically significant positive effect on NWEA MAP math outcomes in a multi-site student-level randomized trial |
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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