“…Driven by concerns about workforce readiness, global competitiveness, and equity in access, the United States has participated in a decades-long push to accelerate mathematics instruction (see Balfanz, Legters, & Jordan, 2004; National Research Council, 2011; Oakes, 2005). Much of the effort toward this has been through universal access to algebra during middle school—most commonly, by eighth grade (Simzar & Domina, 2014). Students who fail to master algebra in eighth or ninth grade face a blocked pathway to advanced mathematics and participation in science, technology, engineering, and math (STEM) career opportunities (Attewall & Domina, 2008; Long, Conger, & Iatarola, 2012).…”