Charter learning gains in each of the three growth periods do not differ statistically from TPS peers¶

Claim · All claims
Evidence · 1 study · causal r2 · q3
Currency · newest study 2020 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q3 i? In the 2015-2016, 2016-2017, and 2017-18 growth periods, charter students' gains were positive but not statistically different from TPS peers; gains were largest in 2015-16. → CREDO 2020

Evidence¶

CREDO 2020¶

CREDO, Center for Research on Education Outcomes, Stanford University. (2020). Charter School Performance in the State of Washington. https://credo.stanford.edu/reports/item/charter-school-performance-in-the-state-of-washington-2/

q3 · i? · causal · r2

Growth-period disaggregation of the VCR matched analysis. The report states that during 2015-2016 charter students demonstrated growth of "approximately 59 more days of learning in reading and 94 additional days in math" compared with TPS peers, though these gains were not statistically different; later periods showed smaller positive gains.

"The gains of Washington charter school students during the 2015- 2016, the 2016-2017, and the 2017 -18 growth period do not differ statistically from the performance of their TPS peers."

Discussion¶

Related Claims¶

• Idaho charter reading advantage appears only in the 2016-2017 growth period, not in 2015-2016 — 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
• Charter math disadvantage varies across growth periods and narrows over time, with no significant math difference in 2017-18 — reports the opposite
• Charter students' learning growth in the first, second, and third year of enrollment is not statistically different from TPS peers — related
• Washington charter students' overall annual reading and math gains do not differ statistically from matched TPS peers — related
• No cohort-by-years-of-enrollment configuration shows statistically different learning gains from TPS — a broader claim this one bears on
• Charter students' math disadvantage is concentrated in the first two growth periods, with performance similar to VCR peers by 2016-2017 — reports the opposite
• First- and second-year Idaho charter students show growth not statistically different from their TPS VCRs — related