At the beginning of the year fathers either sign up or are assigned a Monday morning when they come to speak to grades 1-6 students. Ministers take turns to come in once a week to speak to grades 7-12. We don’t have a theme assigned.
Perhaps the part of the question on how we work to develop student leadership would go more with how we do our smaller groups made up of individuals from grades 1-12. Each senior has a group of 6-7 younger students from various grades assigned to him/her. We call them our LION groups — standing for Lead, Inspire, Optimize, Nurture. These senior (and a few junior) leaders meet periodically with our principal to be mentored on how to lead well. They then eat with their group once a month and also play together at that recess with the seniors leading out. Intentional interaction (outside of these scheduled times) with the younger members of their group is strongly encouraged. Those in the same group from grades 1-8 play together once a week. At these weekly recesses, the junior leaders (from grades 7-8) are responsible to lead out. This has seemed to work well for our school and the older ones do very well at leading out.