Claims

Intensive three-year professional development changed Leader Teachers' practice dramatically, but peer diffusion of reform was uneven

Claim · All claims
Evidence · 1 study (2 entries) · design r3 · q2
Currency · newest study 2003 · 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.

q2 i? Leader Teachers receiving nearly 500 hours of professional development over three years changed their practice dramatically and engaged students in inquiry regularly, though practice stabilized after three years. → Corcoran 2003 q2 i? After two years, the impact of Leader Teachers spreading reform to colleagues was uneven, with obstacles including credibility, time constraints, peer resentment, and lack of principal support. → Corcoran 2003 (2)

Evidence

Corcoran 2003

Corcoran, Tom. (2003). The Merck Institute for Science Education: A Successful Intermediary for Education Reform. CPRE Research Report Series RR-052. https://eric.ed.gov/?id=ED480404 doi:10.1037/e383112004-001

q2 · i? · design · r3

CPRE observations and surveys of Leader Teachers from the three-year voluntary Leader Teacher Institute, which enrolled more than 140 teachers across the four districts and focused each year on a different science domain.

"The Leader Teachers received nearly 500 hours of professional development over three years, and observations of their practice by CPRE researchers found that their teaching changed dramatically by the third year and was considerably above average on a National Science Foundation (NSF) observation classroom instrument."

Corcoran 2003 (2)

Corcoran, Tom. (2003). The Merck Institute for Science Education: A Successful Intermediary for Education Reform. CPRE Research Report Series RR-052. https://eric.ed.gov/?id=ED480404 doi:10.1037/e383112004-001

q2 · i? · design · r3

CPRE's account of the Leader Teacher diffusion strategy: success depended on selecting respected individuals with science interest and knowledge, principal support, and released time; prevailing norms of teacher autonomy made spreading inquiry difficult.

"After two years, however, it was clear that the impact of this change strategy was un- even. Some Leader Teachers were suc- cessfully engaging their colleagues but others encountered serious obstacles, such as their own credibility as science teachers, time constraints, peer resent- ment, and lack of principal support."

Discussion

Page metadata
Field Value
type claim
id leader-teacher-diffusion-uneven
title Intensive three-year professional development changed Leader Teachers' practice dramatically, but peer diffusion of reform was uneven
description Intensive three-year professional development changed Leader Teachers' practice dramatically, but peer diffusion of reform was uneven
status review
evidence_strength moderate
newest_evidence 2003
generated by process:wiki-ingest on 2026-09-26
trust unverified — no one has confirmed this page's content
sources 2 — corcoran-2003, corcoran-2003-2

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