Congrats on getting the scores!
Just a few thoughts about resources within a community like that. Ditto on the above suggestions. Many scientists/mathematicians... enjoy conversing about their fields, even if it's via e-mail for a while. There may be scientists within a longer drive from your area, as well. It sounds as if you already have some great learning opportunities in your back yard, and looking up some of the science on-line about those adventures could be a good place to start.
If there's an issue of getting to the library (not sure if you have one nearby), many publishers offer deals on higher level reading material. Dover prints some of the classics, as well as history/math/science books at various levels (some recreational math, some all the way to graduate-level math) with completed exercises.
Also, if she enjoys math and making graphs, there is an excellent free software program with many on-line help resources called R (from a website called CRAN) that allows users to make graphs and analyze data (might be a good addition to some of those outdoor outings). Most of their (free!) add-on packages come with scientific papers, as well.
