Just read this article the other day --> http://www.linuxjournal.com/article/9800
. Another education-related used of FOSS.
Answers to the following not require, just for you to think about...
Who is on the tech committee? I mean, are there enough technicians in a small-town school district to create a committee? Is the committee responsible for technology infrastructure, technology in the classroom, or both? Are there teachers, administrators, bean-counters, and that ilk on the committee? If so, what do they know about FOSS?
Do you have AP courses or, for example, a regional Math and Science Center where all the nerds go to school? Someplace you could leverage FOSS applications such as Octave, Euler, R, VTK, etc. rather than trying to convince them to replace commercial software (that's probably already paid for) with FOSS. Teaching kids to use the types of software they'll be using at university makes graduates of your school district better prepared. Most of these types of applications are available for Linux, Windows, and OSX. It reminds me of The GIMP....my kids installed on their art teacher's computer last year and it's now being used for all art classes at their school (or so they tell me).