To investigate the contribution of the DR K‐12 portfolio to the knowledge base on math and science learning among ELLs, CADRE designed a study to explore the ELL work that is being conducted in the DR K‐12 projects. This paper summarizes the work of this study. It begins with a description of the methodology employed, followed by a presentation of the findings, and finally a discussion of the conclusions drawn from this work. The findings are organized into discussions about the expertise held by the DR K‐12 ELL researchers and research teams, the characteristics of the ELL research being conducted by the DR K‐12 projects, and a comparison of the research conducted by the DR K‐ 12 projects with published research on ELL‐science education and ELL‐math education.