Of 18 reviewed Tier 2 literacy interventions, three had at most promising evidence and 12 had uncertain evidence of effects¶
Claim · All claims
Evidence · 1 study · reviewr3·q3
Currency · newest study 2024 · 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 i? LetterWorks, Lexia Core5 Reading, and Seeing Stars had at most promising evidence, and the remaining 12 interventions had uncertain evidence of effects. → Porowski 2024
Evidence¶
Porowski 2024¶
Porowski, A., Tamang, S., Westall, J., Brown, K., & Bogia, M. (2024). Evidence and gap map of Tier 2 literacy interventions for grades K–3 in the Commonwealth of the Northern Mariana Islands (REL 2025–007). U.S. Department of Education, Institute of Education Sciences, National Center for Education Evaluation and Regional Assistance, Regional Educational Laboratory Pacific. https://ies.ed.gov/use-work/resource-library/reports/
q3 · i? · review · r3
Systematic review of 20 studies covering 18 interventions, all meeting WWC 5.0 standards with or without reservations, reports that only two interventions had strong evidence and one moderate evidence; "The remaining 12 interventions had uncertain evidence of effects."
"Three additional interventions—LetterWorks, Lexia Core5 Reading, and Seeing Stars—had, at most, promising evidence."
Discussion¶
Related Claims¶
- Common strategies across reviewed Tier 2 interventions include structured curriculum, small group instruction, and progress-monitoring assessment tools — related
- Core5 use for one year yields significantly higher MAP reading scores than control for K-5 special education students (ES = +0.23) — related
- Across four studies of Lexia Core5, the average effect size on reading outcomes is +0.16 — related
- Core5 students in grades 3-5 showed significantly larger reading achievement gains than a matched comparison group (ES = +0.11) — related
- None of the WWC-standards-meeting studies of Tier 2 literacy interventions were conducted in CNMI or other Pacific islands, limiting generalizability — related
- Literacy First shows strong ESSA evidence of positive effects in phonics and related alphabetics, reading fluency, and reading comprehension for grades K–2 — reports the opposite
- Reading Recovery improves receptive communication skills immediately after the intervention, with promising evidence from one small quasi-experimental study — a narrower finding that bears on this claim
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
most-tier2-interventions-uncertain-or-promising-evidence |
title |
Of 18 reviewed Tier 2 literacy interventions, three had at most promising evidence and 12 had uncertain evidence of effects |
description |
Of 18 reviewed Tier 2 literacy interventions, three had at most promising evidence and 12 had uncertain evidence of effects |
status |
review |
evidence_strength |
moderate |
newest_evidence |
2024 |
generated |
by process:wiki-ingest on 2026-10-08 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — porowski-2024 |
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