SISTEM’s overarching goals are to (1) Increase DLL PreK families’ perceptions of themselves as partners in their children’s science learning and their engagement, confidence, and skills in supporting their children’s science inquiry; (2)Increase PreK DLL teachers’ perceptions of themselves as partners in their students’ science learning and their skills and self-efficacy in facilitating science inquiry with DLLs; (3) Increase children’s, families’ and teachers’ knowledge of STEM careers; and (4) Improve PreK DLLs’ science, language and literacy skills and their interest and self-confidence in doing and learning science.