The Power of Discovery – STEM2 is an effort to build the power of schools and community‐based organizations to expand learning opportunities in science, technology, engineering and mathematics (STEM) for young people in California. By building collaborative and effective partnerships between schools and after school organizations, and by mobilizing a broad coalition of community partners with STEM expertise and resources, STEM2 will enhance school–based STEM instruction and expand out of school STEM learning opportunities. Regional and local implementation headed by five Regional Innovation Support Providers. Funded by the Noyce, Samueli, S.D. Bechtel, Jr., Foundations.