Drawing on deep expertise and diverse experiences in the sector, the National Association of Charter School Authorizers (NACSA) and the Charter School Growth Fund (CSGF) have collaborated to identify a set of key policies and practices that could dramatically accelerate the replication and growth of high-performing charter schools and charter networks. The work has generated a set of detailed recommendations that legislators, authorizers, and state education agencies (SEAs) can use to build a policy environment that will substantially increase the prevalence and impact of high-quality charter schools. The policy recommendations in this report provide a roadmap for systematically improving the quality of the charter sector. By differentiating among charter operators based on performance levels, building system capacity to cultivate and support high-performing schools and networks, reducing barriers and adding support to facilitate quality replication, and accelerating the closure of low-performing schools, the charter sector can create excellent educational opportunities for a dramatically greater number of children.