The Expanding Computing Education Pathways (ECEP) Alliance, a National Science Foundation BPC Alliance, works with broad based leadership teams in 22 states and the territory of Puerto Rico to develop policy, interventions, and metrics that broaden participation in computing from the state to the student level. ECEP serves as the backbone organization, building a common agenda, facilitating network communications, & supporting mutually reinforcing activities across the ECEP Alliance & in individual states in order to increase capacity, access, participation & experiences for K-16 students underrepresented in computer science education.