Charter math disadvantage varies across growth periods and narrows over time, with no significant math difference in 2017-18¶
Claim · All claims
Evidence · 1 study · causalr2·q3
Currency · newest study 2019 · not yet checked against its sources · not reviewed by a person · overdue for a recheck since 2024: 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.
q3 i? Charter students' math gaps versus TPS peers were 53 fewer days of learning in the 2014-15 and 2016-17 periods, 77 fewer days in 2015-16, and not statistically different in 2017-18. → CREDO 2019
Evidence¶
CREDO 2019¶
CREDO, Center for Research on Education Outcomes, Stanford University. (2019). Charter School Performance in South Carolina. https://credo.stanford.edu/reports/item/charter-school-performance-in-south-carolina-2019-2/
q3 · i? · causal · r2
Period-by-period analysis of charter versus VCR learning gains across four growth periods, 2014-15 to 2017-18; the 2017-2018 math gains did not differ statistically from TPS peers, and the report calls the year-to-year trend positive.
"During the 2014-15 and the 2016-17 growth periods, charter students had 53 fewer days of learning progress in math than their TPS peers in the respective periods, while the gap was wider in 2015-16, reaching 77 fewer days of learning in math."
Discussion¶
Related Claims¶
- Charter students' math disadvantage is concentrated in the first two growth periods, with performance similar to VCR peers by 2016-2017 — reports the opposite
- Charter attendance in Rhode Island is associated with positive, significant one-year growth gains in reading (0.16 SD) and math (0.15 SD) relative to matched TPS controls — reports the opposite
- South Carolina charter students show similar reading growth but weaker math growth than traditional public school peers, with a math disadvantage of 53 fewer days of learning per year — related
- Charter learning gains in each of the three growth periods do not differ statistically from TPS peers — reports the opposite
- About 30 percent of South Carolina charter schools outperform traditional alternatives in reading and 15 percent in math, while 22 percent and 33 percent underperform — related
- Charter students' learning growth in the first, second, and third year of enrollment is not statistically different from TPS peers — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
sc-charter-math-gap-narrows-over-growth-periods |
title |
Charter math disadvantage varies across growth periods and narrows over time, with no significant math difference in 2017-18 |
description |
Charter math disadvantage varies across growth periods and narrows over time, with no significant math difference in 2017-18 |
status |
review |
evidence_strength |
moderate |
newest_evidence |
2019 |
recheck_by |
2024 |
generated |
by process:wiki-ingest on 2026-10-08 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — credo-2019 |
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