The double-dose policy led schools to track algebra classes by entering math skills, making classrooms more homogeneous in ability¶

Claim · All claims
Evidence · 1 study · causal r2 · q2
Currency · newest study 2008 · checked against its sources 2026-10-15 (automated, 1 of 1 entry) · not reviewed by a person

Subclaims¶

q2 i? After the policy, math classes became more homogeneous in incoming math ability for both low- and high-ability students, with the largest decline in heterogeneity among students just below the national median. → Takako Nomi and Elaine M. Allensworth 2008

q3 i? The policy induced a change in school organization: algebra classes were tracked by students' entering math skills. → Nomi & Allensworth 2009

Evidence¶

Takako Nomi and Elaine M. Allensworth 2008¶

Takako Nomi and Elaine M. Allensworth. (2008). “Double-dose” Algebra as an Alternative Strategy to Remediation: Effects on Students’ Academic Outcomes. Consortium on Chicago School Research, University of Chicago. http://www.informaworld.com/smpp/content~db=all?content=10.1080/19345740802676739

q2 · i? · causal · r2

Descriptive analysis of CPS course transcript data showing how the three structural guidelines (same teacher, sequential courses, same peers) induced sorting of above- and below-norm students into separate algebra courses. No effect size printed.

"After the policy was implemented, math classes became more homogenous in terms of students‘ incoming math abilities. This decline in classroom heterogeneity occurred among both low- and high-ability students, but was largest among students with incoming test scores just below the national median."

Discussion¶

Learner Variables¶

• General Cognitive Ability — outcome: instruction changes it

Related Claims¶

• Chicago's algebra-for-all policy led schools to create more mixed-ability math classrooms when eliminating remedial classes — reports the opposite
• Peer skill levels declined for high-skill students in algebra classrooms after the policy — related
• Double-dose algebra policy increased academic demand for both high- and low-skill students, with below-norm students' gains not attributable to peer ability changes — related
• Tracking intensified concentration of behavioral and absentee problems in double-dose algebra classes, explained by declines in peer ability — related
• Evidence on the policy's effects on 10th-grade geometry outcomes was inconsistent across groups and years — related
• Chicago's double-dose algebra policy raised algebra test scores for both low-skill and high-skill students — related
• Algebra failure rates rose post-policy for above-norm students (~3 percentage points) but fell for below-norm students (~4 points); classroom environment and peer ability explained most of the above-norm rise but not the below-norm fall — related
• Interactive pedagogy increased nearly half a standard deviation for below-norm students in homogeneous double-dose algebra classes — related
• Extended learning time interventions, including week-long acceleration academies with highly effective teachers and some double-dose math structures, show strong evidence of effectiveness — related
• Grade retention and tracking students into remedial instruction undermine achievement, while formative assessment with acceleration strategies improves learning — related
• Between- or within-class homogeneous ability grouping has a small negative effect on low-ability primary students but no effect on other students — related