My COSI partner Jen Cassidy and I have been awarded an NSF Advancing Informal STEM Learning (AISL) Pathways Grant for our project ‘Expanding Repertoires of Practice: Improving Informal Science Learning Experiences for Dual Language Learners‘. In this project, we will collaborate with 8 other science centers and children’s museums and their community partners to begin the systematic study of informal science education programs and practices for reaching and serving preschool dual language learners. The project includes three interconnected activities: (1) a national needs assessment of children’s museums and science museums, (2) a two-day, in-person convening and quarterly virtual meet-ups of museum-community teams, and (3) an exploratory study of informal science programs and experiences at COSI and in early learning centers in Central Ohio. The overarching goal is to advance the knowledge and awareness of needs and practices related to informal science programming for preschool children who are learning English as an additional language.