Before revision: In sociology and anthropology, an age grade or age class is a form of social organization based on age, within a series of such categories, through which individuals pass over the course of their lives.
After revision: For Ageclass in forestry see Timber metricsIn sociology and anthropology, an age grade or age class is a form of social organization based on age, within a series of such categories, through which individuals pass over the course of their lives.