In 2018 and early 2019, AIR surveyed a representative sample of 744 directors of early learning and care programs across California about their instructional and family engagement practices to support dual language learners, as part of the First 5 California Dual Language Learner Pilot Study. Through this survey, directors were asked how their program identifies students as DLLs, and whether their program formally collects information on how many children in the program are DLLs. (author abstract)