The "Examining Implementation and Outcomes of the Project On-Track High-Dosage Literacy Tutoring Program" study describes the characteristics of students who participated in a full year of Project On-Track, a high-dosage, small-group literacy tutoring program for students in grade 1-3. Its online adaptive program, Amplify Reading, groups students by skill level and generates mini-lessons aligned to the science of reading that are delivered by tutors. Although the content of the tutoring sessions is highly structured, Project On-Track offers schools flexibility in how they implement the program, including when they provide tutoring, who provides tutoring, in which grade levels they offer tutoring, and how they identify students within a grade level for tutoring. This flexibility can make it easier for schools to adopt the program, particularly rural schools, which may face greater challenges in hiring tutors or delivering tutoring outside of school hours. It also examined how schools implemented the program, with a focus on three implementation features: when and how frequently tutoring is offered and who provides it. This document presents the following three appendixes that accompany the study: (1) Methods; (2) Qualitative case studies; and (3) Supporting analyses.