Community and city innovations sometimes seem like tiny bright spots amidst dysfunctional systems, and the need to achieve positive change “at scale” is clear. But when we think about how to spread or deepen solutions to social problems, it’s not that simple – social issues are hugely dependent on context, systems are nested across many scales, and we need to think differently about scaling for social change. We’ll consider and apply three approaches to scaling innovations so they can have more systemic impact – “Scaling Up” to policy change, “Scaling Out” through program replication, and “Scaling Deep” by engaging people’s hearts and minds to shift cultures.