Strong partnerships between schools and expanded learning programs lay the foundation for building stronger, more equitable support systems for children and their families. Building on prior investments in the expanded learning system, California's school reopening guidance encouraged intentional coordination across schools and expanded learning providers to best meet the needs of students during this unprecedented time. This brief provides key principles for school and expanded learning partnerships--informed by insights from leaders and practitioners from across California-- that policymakers and practitioners should consider as they move from reopening to rebuilding.