The report "How a Federal Grant Program Is Training and Supporting Educators of English Learners" examines the extent to which National Professional Development (NPD) grantees implemented their projects in ways aligned with program objectives, drawing primarily on a survey of all 2016 and 2017 NPD grantees. This document provides background information about the NPD program (Appendix A), the data sources and measures used in this study (Appendix B), supporting statistical details and supplemental findings related to the findings presented in the report (Appendix C), and findings from additional analyses that are not discussed in the report but may help readers better understand the findings (Appendix D).