Accelerated middle schools show potentially positive effects on staying in school, with an average improvement index of +18 percentile points¶

Claim · All claims
Evidence · 1 study · quant-synthesis r1 · q3
Currency · newest study 2008 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q3 i? Across three RCTs, accelerated middle schools had potentially positive effects on staying in school; the average improvement index was +18 percentile points, ranging from –5 to +33 across studies. → What Works Clearinghouse 2008

Evidence¶

What Works Clearinghouse 2008¶

What Works Clearinghouse. (2008). WWC Intervention Report: Accelerated Middle Schools. U.S. Department of Education. https://ies.ed.gov/ncee/wwc/InterventionReport/11

q3 · i? · quant-synthesis · r1

WWC synthesis of three randomized controlled trials (more than 800 students in Georgia, Michigan, and New Jersey) meeting evidence standards with or without reservations. The report states the "average improvement index for staying in school is +18 percentile points" with a range of –5 to +33; no standardized effect size is printed for this domain average.

"Based on the three studies of accelerated middle schools that met evidence standards, the average improvement index for staying in school is +18 percentile points, with a range of –5 to +33 percentile points across the studies."

Discussion¶

Related Claims¶

• Effects of accelerated middle schools on dropping out varied by site: significant in Michigan, substantively important but not significant in Georgia, and null in New Jersey — a narrower finding that bears on this claim
• Accelerated middle schools show positive effects on progressing in school, with an average improvement index of +35 percentile points — related
• The average improvement index for New Chance on completing school is +8 percentile points — related
• Adult advocacy interventions show promising but variable effects on staying in and progressing in school — related