There is a great need to scale up proven health interventions for the urban poor, including improving access to contraception, in a sustainable and cost-efficient way.n To enable the scale-up of intervention packages across multiple geographies, The Challenge Initiative (TCI) platform includes regional technical assistance hubs that meaningfully engage local stakeholders and systems and a global partner that raises funds; supports shared learning; and upholds consistent practices, processes, and standards across all hubs.n Government self-selection and commitment of funds to participate in TCI are critical to the ownership and sustainability of the change process; they also complement and reinforce local leadership in program design, implementation, and management.