This study meta-analyzed the last four decades of reading intervention research focused on improving reading outcomes for English language (EL) students in Grades K-5 with or at risk for word reading difficulties. Experimental and quasi-experimental group design and single-case experimental design (SCED) studies were included; 10 group design and 7 SCED studies met inclusion criteria (m = 61; total student N = 2,270). Visual inspection of the effect size distribution revealed that the assumption of between-study heterogeneity was not supported; therefore, the findings were synthesized for SCED studies separately from those reported in group design studies. Implications for practice, policy, and future research are discussed.In public schools across the United States, English learners (ELs) constitute a large and fast-growing student demographic (National Center for Educational Statistics [NCES], 2020). Specifically, in the fall of 2018, more than 10% of the nation's K-12 students were classified as ELs, representing approximately 5 million students (NCES, 2020). Nationwide, the number of ELs in school grew by 28% from 2000 to 2016, with 17 states seeing a greater than 100% increase (Office of English Language Acquisition, 2020).National data demonstrate that many children who are ELs are not able to read proficiently; for example, the majority of fourth-grade EL students are not reading at a proficient level (10%; National Association of Education Progress, 2019). Complex and interrelated factors explain disparities in elementary-grade reading performance between EL and English monolingual (EM) students. Demographic data suggest that Hispanics experience systemic inequities in access to education, healthcare, and economic opportunities, and communities with large proportions of ELs experience higher poverty rates (National Center for Education Statistics, 2019). As a result, more ELs attend schools of poorer quality and with fewer resources and experienced teachers than do EM students (Cosentino de Cohen et al., 2005;Gándara et al., 2003; Office for Civil Rights, 2016). Income disparities also factor into fewer out-of-school-time (OST) opportunities available to ELs, both before and after the Requests for reprints should be sent to Emily J. Solari, University of Virginia. Electronic inquiries should be sent to