Average impacts of KIPP middle schools were positive and statistically significant throughout the 10-year study period, though higher in earlier years than recent years¶

Claim · All claims
Evidence · 2 studies · 2 causal r? · q2–q3
Currency · newest study 2015 · checked against its sources 2026-10-20 (automated, 2 of 2 entries) · not reviewed by a person

Subclaims¶

q2 i? Middle school impacts remained positive and statistically significant across the 10-year period covered by the study, but declined in magnitude in recent years relative to earlier years. → Christina Clark Tuttle 2015

q3 i? Average impacts of KIPP middle schools remained positive and statistically significant across the 10-year period covered by the study, but were higher in earlier years than in recent years. → Tuttle 2015

Evidence¶

Christina Clark Tuttle 2015¶

Christina Clark Tuttle, Philip Gleason, Virginia Knechtel, Ira Nichols-Barrer, Kevin Booker, Gregory Chojnacki, Thomas Coen, Lisbeth Goble. (2015). Understanding the Effect of KIPP as it Scales: Volume I, Impacts on Achievement and Other Outcomes (Executive Summary). Washington, DC: Mathematica Policy Research. https://www.mathematica.org/publications/executive-summary-understanding-the-effect-of-kipp-as-it-scales-volume-i-impacts-on-achievement

q2 · i? · causal · r?

The key findings report that average middle school impacts were "positive and statistically significant throughout the 10-year period covered by the study," with a printed pattern of higher impacts in earlier years than recent years. No effect sizes are printed.

"Average impacts of middle schools were positive and statistically significant throughout the 10-year period covered by the study, though higher in earlier years than recent years."

Tuttle 2015¶

Tuttle, C. C., Gleason, P., Knechtel, V., Nichols-Barrer, I., Booker, K., Chojnacki, G., Coen, T., & Goble, L. (2015). Going to Scale: As KIPP Network Grows, Positive Impacts Are Sustained (In Focus Brief). Washington, DC: Mathematica Policy Research. https://www.mathematica.org/publications/going-to-scale-as-kipp-network-grows-positive-impacts-are-sustained

q3 · i? · causal · r?

The Key Findings section reports a temporal pattern in middle school impacts over the study's 10-year period: sustained positive, statistically significant average impacts, with the printed observation that impacts were "higher in earlier years than recent years." No effect sizes are printed.

"Average impacts of middle schools were positive and statistically significant throughout the 10-year period covered by the study, though higher in earlier years than recent years."

Discussion¶

Related Claims¶

• For students continuing from KIPP middle schools to KIPP high schools, achievement impacts are not statistically significant — related
• A lottery-based randomized controlled trial of KIPP middle schools found statistically significant positive effects on state math and reading tests — related
• In the vast majority of 22 KIPP middle schools, impacts on students' state assessment scores in math and reading are positive, statistically significant, and educationally substantial — related
• KIPP charter schools have positive effects on English language arts achievement for middle and high school students — related
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• The evaluation covers 43 KIPP middle schools across 13 states and the District of Columbia and is the most rigorous large-scale evaluation of KIPP charters to date — related
• A lottery-based randomized experimental analysis confirms KIPP middle schools' positive impacts — related
• The Fisher Fellowship selection instrument is reliable, though three of 34 items had relatively low levels of one type of reliability — related
• Impacts of charter middle schools on achievement varied considerably across schools and students — related
• An earlier report of the national KIPP evaluation described strong positive achievement impacts in math and reading for 22 KIPP middle schools — related
• No detectable effects of KIPP Atlanta Collegiate High School on overall credential completion during the study period — related
• The KIPP lottery-based randomized controlled trial yielded treatment and control groups similar on observable and unobservable characteristics — related
• Recent evidence confirms teacher quality is a critical component of student achievement
• In the earlier National Evaluation of Charter Middle Schools, admission to about 30 charter middle schools produced no significant average effects on achievement, though some schools improved achievement — related
• Unlike district schools, KIPP middle schools tend to replace exiting students with higher-achieving students — related