KIPP charter schools have positive effects on mathematics achievement for middle and high school students¶

Claim · All claims
Evidence · 1 study · quant-synthesis r2 · q3 · i1 small
Currency · newest study 2018 · checked against its sources 2026-10-15 (automated, 1 of 1 entry) · not reviewed by a person

Subclaims¶

q3 i1 Across four studies including 19,542 students, KIPP had positive effects on mathematics achievement, with an average improvement index of +12 percentile points (range +7 to +20). → Knowledge Is Power Program (KIPP) 2018

Evidence¶

Knowledge Is Power Program (KIPP) 2018¶

Knowledge Is Power Program (KIPP). (2018). What Works Clearinghouse Intervention Report: Charter Schools. https://ies.ed.gov/ncee/wwc/InterventionReport/688

q3 · i1 · small effect, average effect size 0.29 · quant-synthesis · r2

WWC systematic review of four studies meeting group design standards. Table 1 reports mathematics achievement rated "Positive effects" with average improvement index +12, range +7 to +20, from "4" studies including "19,542" students; extent of evidence medium to large. Appendix C.1 prints the WWC-computed effect sizes: domain averages of 0.18, 0.27 and 0.20 for the Tuttle et al. (2015) analyses and 0.52 for Woodworth et al. (2008), and 0.29 across all studies (the +12 improvement index is computed from it).

"KIPP had positive effects on mathematics achievement and English language arts achievement, and potentially positive effects on science achievement and social studies achievement for middle and high school students"

Discussion¶

Related Claims¶

• KIPP charter schools have potentially positive effects on social studies achievement, with mixed study findings — related
• KIPP charter schools have positive effects on English language arts achievement for middle and high school students — related
• KIPP charter schools have potentially positive effects on science achievement for middle and high school students — related
• A lottery-based randomized controlled trial of KIPP middle schools found statistically significant positive effects on state math and reading tests — a narrower finding that bears on this claim
• 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 — a narrower finding that bears on this claim
• The Kauffman School's achievement impacts are higher than the average impacts found in studies of other charter schools — related
• KIPP elementary schools have positive, statistically significant, and educationally meaningful impacts on three of four measures of reading and mathematics skills — related
• For students continuing from KIPP middle schools to KIPP high schools, achievement impacts are not statistically significant — related
• KIPP high schools have positive, statistically significant, and educationally meaningful achievement impacts for students new to the KIPP network — related
• KIPP high schools have positive, statistically significant achievement impacts for students new to the KIPP network, but not for students continuing from KIPP middle schools — related
• 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 — related
• KIPP middle schools have positive, statistically significant, and educationally meaningful impacts on student achievement in math, reading, science, and social studies — a narrower finding that bears on this claim
• KIPP charter middle schools produce positive, statistically significant test-score effects in reading, math, science, and social studies — a broader claim this one bears on
• Impacts of charter middle schools on achievement varied considerably across schools and students — related
• Prior research on KIPP suggested positive achievement impacts but was limited by small samples or methodological weaknesses — a broader claim this one bears on
• Students in single-discipline courses begin the year with higher achievement, roughly three or four points across subjects — related
• KIPP middle schools' positive effects extend to enrollment in 4-year college programs, not only middle school achievement — related