Ready, Set, Leap!® shows no significant effect on preschool math; the study authors' negative finding was not significant in WWC calculations¶
Claim · All claims
Evidence · 1 study · causalr2·q3·i0negligible
Currency · newest study 2008 · 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.
q3 i0 PCER Consortium (2008) reported a negative, statistically significant effect on one math measure, but WWC recalculations found it neither statistically significant nor substantively important; the domain average effect size was –0.04. → What Works Clearinghouse 2008
Evidence¶
What Works Clearinghouse 2008¶
What Works Clearinghouse, U.S. Department of Education. (2008). WWC Intervention Report: Ready, Set, Leap!®. https://ies.ed.gov/ncee/wwc/InterventionReport/430
q3 · i0 · causal · r2
Math findings from one RCT (21 schools). Appendix A3.5 prints effect sizes of 0.04 (WJ III Applied Problems), –0.24 (CMA-A Composite), and 0.08 (Shape Composition), all ns after WWC corrections; domain average –0.04, improvement index –2.
"PCER Consortium (2008) showed that Ready, Set, Leap!® had a negative and statistically significant effect on math when measured using Building Blocks, Shape Composition task."
Discussion¶
Related Claims¶
- Ready, Set, Leap!® has no significant effect on preschool early reading/writing (effect size 0.09) — related
- Ready, Set, Leap!® effects do not persist to kindergarten follow-up on oral language, print knowledge, or math measures — related
- Ready, Set, Leap!® shows no discernible effects on oral language, print knowledge, phonological processing, early reading/writing, or math in preschoolers — a broader claim this one bears on
- Ready, Set, Leap!® has no significant effect on preschool oral language (domain average effect size 0.02) — related
- Ready, Set, Leap!® has no significant effect on preschool print knowledge (domain average effect size 0.06) — related
- Ready, Set, Leap!® has no significant effect on preschool phonological processing (domain average effect size 0.06) — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
ready-set-leap-null-math |
title |
Ready, Set, Leap!® shows no significant effect on preschool math; the study authors' negative finding was not significant in WWC calculations |
description |
Ready, Set, Leap!® shows no significant effect on preschool math; the study authors' negative finding was not significant in WWC calculations |
status |
review |
evidence_strength |
moderate |
newest_evidence |
2008 |
generated |
by process:wiki-ingest on 2026-10-07 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — what-works-clearinghouse-2008 |
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