I'll just throw up a few ideas:
* rain water collection
* food scraps (goes with recycling)
* organic garden
*these three could be combined to benefit each other.
* native species garden
* Convert any of the schools gas driven golf carts/John Deeres to another eco-friendly fuel (like bio diesel if you go that route)
* Eco-architecture - figure out where the best place to put trees is, where to put sun shades and where not to, where to have overhangs, etc. (I can help with this a little bit, too)
* convert existing pavement walkways to water draining walkways (e.g. stone paths with dirt or mulch surrounding each stone)
I will undoubtedly have more ideas for you. If these aren't your cup of tea, let me know (I won't take offense
). I would definitely recommend putting forth something that you are interested in. Don't just suggest something because it is eco-friendly. If you like Baseball, find something that works within that.
Good luck! We need more green initiative leaders like you!