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Superintendents from districts in the Minority Student Achievement Network (MSAN) challenged the Strategic Education Research Partnership (SERP) to identify an approach to narrowing the minority student achievement gap in Algebra 1 without isolating minority students for intervention. SERP partnered with 8 MSAN districts and researchers from 3 universities to design and rigorously test AlgebraByExample, a set of 42 Algebra 1 assignments with interleaved worked examples that target common misconceptions and errors. In a year-long random-assignment study, students who received AlgebraByExample assignments had an average 7 percentage point boost on a posttest containing released items from state assessments, and students in the bottom half of the performance distribution where minority students are disproportionately concentrated had an average 10 percentage point boost on a researcher-designed assessment of conceptual understanding. AlgebraByExample is easily incorporated into any existing curriculum, and naturally serves as a launch point for mathematically rich discussion.The Minority Student Achievement Network (MSAN) is a growing network of 29 suburban and small urban districts committed to eliminating the achievement gaps between their White and Asian students and their African American and Latino students (who range in number from 20% to 83% of the school population). The network was self-organized to accelerate learning in literacy and math and improve college-going rates by learning from each other and from Correspondence should be addressed to M. Suzanne Donovan,