Every squad rotates its captain daily. The captain leads the warm-up call, checks that every teammate has water, and picks the huddle word at the end of the day.
The point is repetition. A child who has led a huddle eleven times is a different child in a classroom than one who has never been asked.
Coaches score effort and sportsmanship publicly, not just wins. Kids notice fast what actually gets recognized, and they adjust toward it.
By the end of a week, the quietest camper has spoken to the group at least once. That is the outcome we are after.