In 2022–23, Institute partners supported districts and schools as they began implementing district-level action plans. The evaluation was designed to assess the level of collaboration between the Institute and district partners, and the effect of the Superintendents’ Plan on school districts’ practices in three high-impact areas—leadership effectiveness, instructional excellence, and family and community partnership engagement. In addition, the evaluation assessed the impact of the plan’s professional development opportunities, including PD for All and the Essential Child Experiences Instructional Toolkit workgroup, on participating early childhood educators. (author abstract)