[mathking]

A lot of burnout and/or intimidation can be avoided if your team is large enough. We tell kids that they should try to schedule one or two weekdays each week and then Saturday if possible. This means that each component team needs to keep its activities updated (we have a job board for this) so that the students and mentors present on any given day know what needs to be done. We generally have two after school and two evening meetings per week, plus Saturdays. Most of our mentors can't make it to all of the weekday meetings, so the component teams divide up into subteams with a mentor and a student leader. Those students leaders and mentors have to make sure their projects stay on track.

That said, we tend to have more than a few kids who come almost every day.