“…At the classroom level, OTL research often captures instructional inputs—such as instructional quality, time on task, and exposure to certain subjects/skills—to examine whether these inputs are related to measures of student learning (Elliott, 2015; Kurz, 2011). At a broader school or district policy level, many studies document differences in access to instructional resources associated with better student outcomes, such as more experienced teachers (Cardichon et al, 2020), higher academic tracks (Oakes, 2005), or more advanced courses (Hallett & Venegas, 2011). Across studies, students from low-income families and students of color, especially Black students, have systematically lower access to these instructional resources or learning opportunities (Carter & Welner, 2013; Duncan & Murnane, 2011).…”