Needs : proposing a variety of specific needs addressed by the sessions.
Space : proposing a variety of space organizations among the sessions.
Contacts : proposing a variety of the types of contact among the sessions.
Actions : proposing a variety of the types of actions among the sessions.
Rotations/turns : proposing a variety of task-related settings among the sessions.
Groups : proposing a variety of group/team compositions among the sessions.
Materials : proposing a variety of material-based activities among the sessions.