Groups, like people, go through stages of development. People’s lives evolve from birth, through the “terrible twos”, adolescence, adulthood, to old age and, finally, to death. For groups, these similar developmental stages are commonly called, forming, storming, norming, performing and adjourning. Unlike people, however, groups do not always progress through these stages in a linear fashion; rather, they move in and out of the five stages over the course of their existence.