And thus, this brings me to....the ever lovely Impact area on the FIRST site
http://www.usfirst.org/about/impact.htm
Hopefully there's something there for you to use.
I would go into more about dealing with school boards (because I had to deal with a rather difficult one myself), but a lot of it has already been said. But...I'd like to see you write something in your local paper, play it up that you're not allowed to go. Maybe that will help

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jessicaboucher.com
FRC Alum, Mentor, Volunteer, lots of things.
Championship Volunteer of the Year, 2016
Advisor,
NE FIRST