This document provides the two appendixes that accompany the full report, "Algebra I and College Preparatory Diploma Outcomes among Virginia Students Who Completed Algebra I in Grades 7-9." Appendix A, "Methods," details the data sources, study population, and analysis methods used in the study. Appendix B, "Supporting Analysis," contains tables showing the numbers of students who completed Algebra I in grades 7-9, the characteristics of those students, and those students' Algebra I and college preparatory diploma outcomes. Data are provided for students in the overall study population, for economically disadvantaged students, and for English learner students and are disaggregated by grade 5 math proficiency level. [For the full report, see ED608303. For the study snapshot, see ED608305.]