This state leadership guide introduces a set of equity-focused resources for state education agency (SEA) leaders to use to engage state and local stakeholders in continuous-improvement processes focused on English Learner programs and services. The guide and its accompanying resources are organized around the three prongs of the Castañeda (1981) framework: (1) Grounding EL-focused continuous improvement in evidence-based principles; (2) Supporting implementation with adequate resources and personnel; and (3) Monitoring progress to ensure effectiveness. Parts 1 and 2 include resources that SEA leaders can draw upon to ground their work to serve English learners. Part 3 presents a progress-monitoring tool that SEA leaders can use with district and/or school leaders to collaboratively develop comprehensive EL programs.