Can I get some ideas to help start a vocal music program in this school?

As many of you know, I have been teaching a music class at a local expeditionary learning school. It has been what’s termed an “Extended Learning Opportunity”, for 9th graders, for 4 rotations of approximately 7 weeks. This class is more for experience than formal instruction, and the format is a rock band. I’m co-teaching with full-time teacher who from the school who is currently working on his music teaching certification.

It recently occurred to me that there is a need in this small school (student pop ~300) for an extra-curricular full-time vocal music program for all grades. The principal is very approachable, and I know I could just walk into his office, and he would gladly sit and discuss this with me. That being said, I would like to have some kind of proposal in hand, to show I’ve been giving it some thought, with a target of starting next August or September, when the next schoolyear begins.

I have no degree, but many years performance experience, ranging from classical to folk, country, blues, rock, and a strong background in theory.