Supplemental Instruction (SI) is an academic support program that targets historically difficult courses. Historically difficult courses have a high rate of D or F grades and withdrawals. SI is a non-remedial approach to course mastery that increases student performance (grades) and retention and offers regularly scheduled review sessions open to all students in the targeted course. These study sessions are informal seminars in which students review notes, discuss readings, develop organizational tools and prepare for examinations. Students learn how to integrate course content with reasoning and study strategies.