Claims

Pre-K Mathematics with DLM Early Childhood Express Math shows no discernible effects on preschool oral language

Claim · All claims
Evidence · 1 study · causal r2 · q2 · i0 negligible
Currency · newest study 2013 · checked against its sources 2026-10-18 (automated, 1 of 1 entry) · 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 i0 Differences between the intervention group and the comparison group on the PPVT-III and the TOLD-P:3 Grammatic Understanding subtest were not statistically significant; the domain average effect size was 0.13. → U.S. Department of Education 2013

Evidence

U.S. Department of Education 2013

U.S. Department of Education, Institute of Education Sciences, What Works Clearinghouse. (2013). Pre-K Mathematics with DLM Early Childhood Express Math. https://ies.ed.gov/ncee/wwc/InterventionReport/381

q2 · i0 · causal · r2

PCER Consortium (2008) randomized trial, 296 children in 36 schools, assessed oral language with the PPVT-III (effect size 0.18) and the TOLD-P:3 Grammatic Understanding subtest (effect size 0.07), both p > 0.05. The domain average effect size was 0.13, below the WWC's 0.25 substantively-important threshold, characterized as an indeterminate effect.

"The authors reported that differences between the Pre-K Mathematics with DLM Early Childhood Express Math group and the comparison group were not statistically significant on any of these measures, and the WWC confirmed those findings."

Discussion

Learner Variables

Page metadata
Field Value
type claim
id prek-mathematics-no-oral-language-effects
title Pre-K Mathematics with DLM Early Childhood Express Math shows no discernible effects on preschool oral language
description Pre-K Mathematics with DLM Early Childhood Express Math shows no discernible effects on preschool oral language
status review
evidence_strength weak
newest_evidence 2013
source_checked 2026-10-18
generated by process:wiki-ingest on 2026-10-07
trust unverified — no one has confirmed this page's content
sources 1 — us-department-of-education-2013

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