This document discusses motivation from several perspectives. It defines motivation as the force that energizes, directs, and sustains behavior. It then examines major theories of motivation including: drive theory which links motivation to biological needs; arousal theory which proposes individuals seek an optimal level of arousal; expectancy theory which ties motivation to expectations of success; and goal setting theory which suggests goals enhance performance. The document also explores approaches to motivation from behavioral, humanistic, cognitive, and social learning viewpoints. Finally, it provides suggestions for teachers to increase intrinsic and extrinsic motivation in students.