Summer Lessons
I don't push summer lessons terribly strongly. I do mention it to parents and students as the school year draws to a close, so that they know it is an option.
Summer is a great time to be able to make good headway in lessons without the distraction of school band competitions.
As a bit of an incentive, I have always had the policy that students who take lessons over the summer will have first call on lesson times in the fall when school resumes. returning students that did not continue over the summer get the second priority. New students get their pick of whatever time slots I have remaining. Even if lessons during the summer can't be weekly, I still encourage them. Any little bit to keep students playing and progressing is invaluable.