David Kolb developed the theory of experiential learning, which defines learning as the process of creating knowledge from experience. The theory describes a four-stage cycle of learning - concrete experience, reflective observation, abstract conceptualization, and active experimentation. Kolb also described four learning styles - accommodating, diverging, converging, and assimilating - based on how people process information through the learning cycle. Kolb's theory provides a framework to understand individual learning styles and allow educators to design activities catered to different styles.