“…When making inferences about growth or changes in academic content assessment scores over time, students’ development of ELP is also important to measure, not only to understand student learning, but also to make decisions about the supports and instructional opportunities that students receive (Umansky, 2016). Extant studies have tended to estimate EL students’ growth patterns either on state content assessments (e.g., Johnson, 2022; Lakin & Young, 2013) or ELP assessments (e.g., Sahakyan & Cook, 2021; Shin et al., 2022). To our knowledge, few studies, if any, have estimated concomitant performance.…”