The First Rehearsal is the most important. This is when the band members, flag line, and drum core meet for the first time. You need to choose a leader for each section of each group. One for each instrument on the field and one for each section of the drums. You only need one flag line leader. The one in charge should be a first part player with experience in a band. The ones with the most experience will be deemed leaders but remember that if one of them shows that they cannot be trusted they can be demoted and someone else put in their place. The sections should all separate into different groups and rehearse the parts they have.