Melisa, does your middle school have some kind of math placement test? To make allowances for differences in school populations and grading, around here everyone is required to take a middle school math placement test. If not, it may be worthwhile asking how they make placement decisions and tailoring your response to their established system.
I know that you are in an area of the state where options may be limited. If you can't get what you need through your local district, you may want to look at online options. There is an online CO state charter school (Provost Academy) and several Front Range districts are offering online options. I don't know exactly how the funding works but you shouldn't have to pay for it.
