These are the appendixes for the report, "Exploring Teachers' Influence on Student Success in an Online Biology Course." This study of an online high school biology course offered by Florida Virtual School examined the variation in students' course segment (similar to semester) completion rates, end-of-segment exam scores, and time to segment completion that is attributable to the influence of teachers. Three appendices are included in the document: (1) Methods; (2) Supporting analyses; and (3) Descriptive analyses. [For the full report, see ED609863; for the study snapshot; see ED609866.]