City-based organizations are playing pioneering roles in the development and implementation of blended learning initiatives. As more of these initiatives demonstrate early successes, their leaders and backers are turning their thoughts to replicating and scaling their efforts to improve student outcomes across their cities. This white paper—published by the organization now known as Education Cities—examines four approaches to scaling a successful blended learning initiative: expanding blended learning to additional schools and classrooms; developing systems and talent for scale; advocating for policies that support expansion of high-quality blended learning initiatives; and amplifying the voices of educators in efforts to influence policy and practice.