This study investigated AP U.S. History teacher characteristics, school and classroom context, instructional and assessment practices, and the relationship of all these variables with student achievement on the AP U.S. History Exam. The study sample consisted AP U.S. History teachers in the state of Georgia (N = 93) representing 14 of the state's 16 RESAs. The requisite quantitative and qualitative data were collected using a standardized online survey. The purpose of the survey was to gather data from AP U.S. History teachers in the state of Georgia from each of the four targeted domains. The targeted domains were teacher characteristics, substantive expertise and professional development, school and classroom context, as well as instructional and assessment strategies. Data collected with respect to the targeted domains served as predictor variables, while the percentage of students in their classes who scored a three or higher on the AP U.S. History Exam served as the criterion variable. Multiple regression analyses and simple analyses of variance were employed to determine which of the variables, or sets of variables, relating to teacher characteristics, context and practices were most highly associated with student success on the AP U.S. History exam. Additionally, a series of multiple regression analyses were employed to identify the most parsimonious predictive model. Findings suggest that AP teaching tenure, teacher gender, experience as an AP Reader, use of APR[superscript R] Potential, enrollment criteria, administrative pressure and employment of APR[superscript R] Vertical Teams and/or Pre-APR[superscript R] strategies were the most predictive variables with respect to student achievement on the exam. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com/en-US/products/dissertations/individuals.shtml.]