The evaluation examined charter school effects by years of operation, grades served, mission, and demographics, plus student composition and turnover¶
Claim · All claims
Evidence · 1 study · causalr?·q2
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.
q2 i? The study examined effects of years of operation, grades served, mission, and demographics on student achievement, as well as the types of students charter schools attract and turnover rates. → Ron Zimmer 2008
Evidence¶
Ron Zimmer 2008¶
Ron Zimmer, Suzanne Blanc, Brian Gill, Jolley Christman. (2008). Evaluating the Performance of Philadelphia's Charter Schools. Santa Monica, CA: RAND. https://www.mathematica.org/publications/evaluating-the-performance-of-philadelphias-charter-schools
q2 · i? · causal · r?
The report describes the scope of its evaluation: it examines "effects of years of operation, grades served, mission, and demographics on student achievement" along with student composition, turnover, and impacts on traditional public schools. Results for these moderators are not printed in the available text.
"They also examine effects of years of operation, grades served, mission, and demographics on student achievement; types of students charter schools attract; turnover rates; and charter schools’ impact on student achievement in traditional public schools."
Discussion¶
Related Claims¶
- Long school days or years, comprehensive behavioral policies with rewards and sanctions, and an achievement-focused mission are most strongly associated with charter school success — related
- A mission that prioritizes boosting student achievement is associated with positive charter-school impacts — related
- Philadelphia charter school students' achievement gains are approximately equal to gains of students attending district-operated public schools — related
- Little evidence that Philadelphia charter schools help or harm achievement of students in nearby district schools — related
- Turnover is higher in charter schools (17.8%) than traditional public schools (14.9%) and higher in city schools (17.7%) than other locales — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
philadelphia-charter-evaluation-multiple-moderators |
title |
The evaluation examined charter school effects by years of operation, grades served, mission, and demographics, plus student composition and turnover |
description |
The evaluation examined charter school effects by years of operation, grades served, mission, and demographics, plus student composition and turnover |
status |
review |
evidence_strength |
weak |
newest_evidence |
2008 |
generated |
by process:wiki-ingest on 2026-10-08 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — ron-zimmer-2008 |
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