This chapter in an edited book focuses on the work of two improvement network hubs in California as they tried to support participating districts and schools to improve the proportion of students “on-track” for post-secondary success. California has a particular stake in figuring out how to support districts in consistently using continuous improvement (CI) to achieve measurable gains in student outcomes because state policy (e.g., Local Control Funding Formula, California’s Every Student Succeeds Act Plan) prescribes CI as the approach to improvement in its accountability system.