This volume serves as a companion to the "Lessons from the First Statewide Family Engagement Centers: Alignment with Federal Priorities and Factors Influencing Implementation" report. The report focuses on the Statewide Family Engagement Centers (SFEC) program and provides insights into its implementation and alignment with federal priorities on family engagement. This appendix provides additional information to supplement the main report, with its content referenced throughout the report. Appendix A presents the study design and analysis. Appendix B includes supporting and supplemental tables that provide additional information about the SFEC program and its implementation.