Claims

Teachers account for large effects on student growth: effect sizes of .77–.88 in reading and .72–.85 in mathematics across years

Claim · All claims
Evidence · 1 study · associational r2 · q2 · i3 large
Currency · newest study 2002 · not yet checked against its sources · not reviewed by a person · overdue for a recheck since 2007: baselines and conditions change

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 i3 Across years, teachers' effects on student growth in reading yielded effect sizes of .77 to .88, and in mathematics .72 to .85. → rowan-growth-1

Evidence

Laczko-Kerr 2002

Laczko-Kerr, I., & Berliner, D. C. (2002, September 6). The Effectiveness of "Teach for America" and Other Under-certified Teachers on Student Academic Achievement: A Case of Harmful Public Policy. Education Policy Analysis Archives, 10(37). http://epaa.asu.edu/epaa/v10n37/

q2 · i3 · associational · r2

This review article reports, citing Rowan, Correnti and Miller (2002), that teacher effects on single-year status were .21 to .42 but growth effects across years were roughly three times greater: printed effect sizes of ".77 to .88" in reading and ".72 and .85" in mathematics, all at or above d = 0.8.

"Analysis of the teachers' effects on student growth in reading yielded effect sizes of from .77 to .88. The teachers' effects on growth in mathematics achievement were equally impressive, yielding effect sizes of between .72 and .85."

Discussion

Page metadata
Field Value
type claim
id teacher-effects-on-growth-rowan
title Teachers account for large effects on student growth: effect sizes of .77–.88 in reading and .72–.85 in mathematics across years
description Teachers account for large effects on student growth: effect sizes of .77–.88 in reading and .72–.85 in mathematics across years
status review
evidence_strength weak
newest_evidence 2002
recheck_by 2007
generated by process:wiki-ingest on 2026-10-16
trust unverified — no one has confirmed this page's content
sources 1 — laczko-kerr-2002

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