The WWC rates The Expert Mathematician as having potentially positive effects on middle school mathematics achievement¶
Claim · All claims
Evidence · 1 study · causalr2·q2
Currency · newest study 2006 · not yet checked against its sources · not reviewed by a person
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? The WWC assigned the rating "potentially positive effects" because the single reviewed study showed a substantively important positive effect and no contrary evidence, but the study did not show statistically significant positive effects. → What Works Clearinghouse 2006
Evidence¶
What Works Clearinghouse 2006¶
What Works Clearinghouse. (2006). WWC Intervention Report: The Expert Mathematician, Middle School Mathematics, Revised October 14, 2006. U.S. Department of Education, What Works Clearinghouse. https://ies.ed.gov/ncee/WWC/InterventionReport/513
q2 · i? · causal · r2
The WWC's intervention rating for the math achievement domain, based on one study meeting evidence standards. Appendix A4 states the program "did not meet the criteria for positive effects because it had only one study" and that the one study "showed a substantively important positive effect."
"The WWC found The Expert Mathematician to have potentially positive effects on mathematics achievement"
Discussion¶
Related Claims¶
- The Expert Mathematician shows a positive but not statistically significant effect on middle school math achievement (effect size 0.35, improvement index +14 percentile points) — possibly the same claim (merge candidate)
- Random assignment in the Baker (1997) trial produced pretest differences favoring the comparison curriculum, controlled by using the pretest as a covariate — related
- The WWC rated JOBSTART as having potentially positive effects on completing school, based on a small extent of evidence from a single study — related
- The WWC rates Connect with Kids as having potentially positive effects on behavior, limited by only one qualifying study — related
- The WWC rated TEEMSS as having potentially positive effects on general science achievement with a small extent of evidence — related
- The WWC rated Too Good for Drugs and Violence as having positive effects on knowledge, attitudes, and values, with a cross-study domain-average effect size of 0.42 — related
- The WWC rated Arthur as having potentially positive effects rather than positive effects because only one study met evidence standards and it lacked a strong design — related
- The WWC rated Waterford Early Reading Program™ as having potentially positive effects on alphabetics, based on a substantively important average effect size with no statistically significant individual outcomes — a broader claim this one bears on
- The WWC Adolescent Literacy review rates PALS as having potentially positive effects on reading comprehension from one trial of students averaging 9.8 years old, with an effect size of 0.48 that is not statistically significant when adjusted for clustering — a broader claim this one bears on
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
wwc-potentially-positive-rating-expert-mathematician |
title |
The WWC rates The Expert Mathematician as having potentially positive effects on middle school mathematics achievement |
description |
The WWC rates The Expert Mathematician as having potentially positive effects on middle school mathematics achievement |
status |
review |
evidence_strength |
weak |
newest_evidence |
2006 |
generated |
by process:wiki-ingest on 2026-10-07 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — what-works-clearinghouse-2006 |
Frontmatter is the page's machine-readable record — see the Schema & Guide.