One of the tasks of Jean-Paul Sartre's later work was to consider how an individual could live freely within a free community. This paper examines how Sartre describes the process of group formation and the implications of this discussion for education. The paper begins with his metaphor of a bus queue in order to describe a series. Then, by means of Sartre's analysis of the storming of the Bastille, the discussion expands to show how a series becomes a genuine group. Finally, suggestions are offered, extrapolated from Sartre's theorizing about groups, as to how teachers might create and maintain genuine groups in and across schools rather than having them remain merely collections of individuals organized from outside. Throughout the paper, the implications of Sartre's insights into groups and educational settings are examined.