iMentor's College Ready Program is a unique approach that combines elements of school-based mentoring, whole school reform, and technology in an effort to help students develop the full suite of knowledge, behaviors, and skills they need to complete high school and enroll and thrive in college. iMentor partners with high schools that serve low-income students, and aims to engage every student at the school, from 9th grade through their high school graduation. Each student is matched with a college-educated mentor; students also attend weekly classes structured around iMentor's College Ready curriculum and taught by iMentor staff. To learn more about the efficacy of iMentor's approach, the Research Alliance for New York City Schools is conducting a mixed-methods evaluation of the College Ready Program in eight New York City high schools. With support from the Social Innovation Fund, the Research Alliance is examining iMentor's roll-out and implementation in these schools, as well as its impact on a range of outcomes related to students' preparation for college. In each school, they are following two cohorts of entering 9th graders who have the opportunity to participate in iMentor, totaling approximately 1,600 students. These technical appendices include the following: (1) Qualitative Data Collection and Analysis Methods; (2) Using Programmatic Data Provided by iMentor to Assess Implementation; (3) Student Survey Construct Items; (4) Mentor Survey Construct Items; (5) Other College Readiness and Mentoring-Related Programs that iMentor Evaluation Schools Are Implementing; (6) Methods for Calculating iMentor's Effects on Non-Academic Outcomes; (7) Methods for Calculating iMentor's Effect on Academic Outcomes and Attendance; and (8) iMentor's Logic Model. [For the full report, see ED573422. For the executive summary, see ED573423.]