Participation in out-of-school time (OST) programs, especially in science, technology, engineering, and mathematics (STEM), has been shown to be beneficial for youth, particularly youth who are underserved. These benefits include promoting academic success, health and well-being, and identity development. Many OST programs and educators seek support for how to promote STEM learning with specific youth audiences, such as Indigenous learners, emergent multilingual learners, and learners experiencing differing physical and/or sensory abilities.

This guide is designed to provide practical strategies and guidance for OST professionals—including educators, program directors, administrators, curriculum developers, professional learning providers, and education researchers—who provide STEM learning activities to youth outside of a formal classroom setting. This guide reflects the collaborative work of WestEd and Northern Arizona University (NAU) through the Planetary Learning that Advances the Nexus of Engineering, Technology, and Science (PLANETS) program, with support from the National Aeronautics and Space Administration (NASA).