Abstract: Embodiments of the invention may be used to both train and test instructor proficiency with a group exercise training routine. In a training mode, the graphical user interface may display visual cues indicating upcoming transitions from one activity to another. In response, the user may perform an action (e.g., clicking a button with a mouse cursor) to select the transition at the appropriate time. In a testing mode, the graphical user interface may display an indication of whether the correct selections are made, as well as made at the right time. This approach allows the user to rapidly develop substantial proficiency with the exercise routine.