There are 1.1 million English learner (EL) students in California, representing 18 percent of the statewide student population (California Department of Education [CDE], 2021b). Following some background on California's standards-aligned instructional materials and on the state's EL student population, this brief summarizes California findings from a nationwide survey on teachers' perceptions of their instructional materials for EL students. The brief highlights teachers' views on the adequacy of their instructional materials for their EL students, how they address any inadequacies, whether the materials help them to provide culturally relevant instruction, and what value they place on particular elements of the materials. Finally, the discussion section of the brief includes implications for improving materials and for strengthening professional learning.