Ready, Set, Leap!® has no significant effect on preschool early reading/writing (effect size 0.09)¶
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 The single early reading/writing finding (WJ III Passage Comprehension) was not statistically significant and its effect size of 0.09 fell below the WWC substantively-important threshold. → 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
One finding in one RCT (17 schools/254 children). Appendix A3.4 prints an effect size of 0.09 (ns) and improvement index +3 percentile points for the WJ III Passage Comprehension subtest.
"RMC Research Corporation (2003) reported no significant effect of Ready, Set, Leap!® on early reading/writing when measured using the WJ III Passage Comprehension subtest, with an effect size not large enough to be considered substantively important according to the WWC standards."
Discussion¶
Related Claims¶
- Ready, Set, Leap!® has no significant effect on preschool print knowledge (domain average effect size 0.06) — related
- Ready, Set, Leap!® shows no significant effect on preschool math; the study authors' negative finding was not significant in WWC calculations — related
- 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 phonological processing (domain average effect size 0.06) — related
- Ready, Set, Leap!® effects do not persist to kindergarten follow-up on oral language, print knowledge, or math measures — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
ready-set-leap-null-early-reading-writing |
title |
Ready, Set, Leap!® has no significant effect on preschool early reading/writing (effect size 0.09) |
description |
Ready, Set, Leap!® has no significant effect on preschool early reading/writing (effect size 0.09) |
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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