Supplemental Instruction (SI) is attached to specific courses which are historically difficult.  The SI  leader attends class sessions and then holds voluntary out-of-class study sessions.  These SI sessions are conducted regularly and begin the second week of class.  Course content is integrated with learning strategies.  The SI leader is trained in specific teaching/learning theories and techniques.  The SI program is supervised by a trained professional staff member.  The SI program is offered only in classes in which the faculty member invites and supports SI.