2. Pedagogical knowledge: The provision of guidance requires a delicate balance of providing timely (and wanted) support while allowing the learner to feel a sense of freedom and remain stay in control to feel a sense of ownership of the garden. Care must therefore be taken in decisions of how and when to provide guidance. Too little guidance can lead to frustration for many users (i.e., the agent should be helpful), while too much may threaten users' feelings of autonomy and freedom in the game environment (i.e., the agent should not be perceived as controlling). Thus, through a combination of unsolicited guidance triggered by evidence of confusion and/or lack of domain knowledge and solicited guidance, when the learner requests help, the agent will seek to be a productive helper while ensuring that the learner is acquiring the needed knowledge and skills to succeed at Virtual Sprouts, and in their regular lives as the relate to eating and exercise.