- Ensemble Session: when an Ensemble is in progress, this is the "Session". It has a set of Participants, and an associated Timer (EnsembleTimer).
- Turn: the period of time when participants are in a single role, typically lasts 3-5 minutes (aka "Rotation")
- Rotation Timer: counts down the amount of time remaining in a rotation
- Rotate: everyone switches roles as defined in the ensemble (Driver becomes Navigator, etc.)