Cognitive Tutor® Geometry shows potentially negative effects on geometry outcomes, with an improvement index of –8 percentile points¶
Claim · All claims
Evidence · 1 study · causalr?·q2
Currency · newest study 2016 · 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? In the one qualifying study (Pane et al., 2010; 669 students), the difference on a district geometry assessment was negative and statistically significant. → Cognitive Tutor® 2016
Evidence¶
Cognitive Tutor® 2016¶
Cognitive Tutor®. (2016). WWC Intervention Report: Cognitive Tutor®, Secondary Mathematics. What Works Clearinghouse, U.S. Department of Education. https://www.carnegielearning.com
q2 · i? · causal · r?
WWC review of one randomized study in eight high schools in Baltimore County, with 669 students in 60 classrooms (329 intervention, 340 comparison) over three school years. The review confirmed "a statistically significant negative difference," rated potentially negative effects with small extent of evidence; the study met standards with reservations due to high attrition.
"Pane et al. (2010) reported, and the WWC confirmed, a statistically significant negative difference between the Cognitive Tutor® Geometry group and the comparison group on the Baltimore County Public School District geometry assessment."
Discussion¶
Related Claims¶
- Cognitive Tutor® Algebra I has mixed effects on algebra outcomes for secondary students, with an average improvement index of +4 percentile points across five studies — related
- Core-Plus Mathematics has potentially positive effects on mathematics achievement for high school students, with an average improvement index of +15 percentile points — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
cognitive-tutor-geometry-potentially-negative-effects |
title |
Cognitive Tutor® Geometry shows potentially negative effects on geometry outcomes, with an improvement index of –8 percentile points |
description |
Cognitive Tutor® Geometry shows potentially negative effects on geometry outcomes, with an improvement index of –8 percentile points |
status |
review |
evidence_strength |
weak |
newest_evidence |
2016 |
generated |
by process:wiki-ingest on 2026-10-09 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — cognitive-tutor-2016 |
Frontmatter is the page's machine-readable record — see the Schema & Guide.