If the school followed this approach to making educational decisions when they were deciding if students were eligible for Special Education, they would be in all kinds of hot water!
Three suggestions for approaches.
My favorite: appeal on the grounds that she clearly does need gifted services in reading. In Special Education, you wouldn't be denied services because you were proficient in math and well below in reading. In fact, a Specific Learning Disability is how about half the US students receiving special education services qualify for services under IDEA.
The math geek way: Look for 95% confidence intervals in the report. If they aren't in there, ask for them. A 95% confidence interval is the statistical way to account for the fact that students perform differently on different days, for all kinds of reasons. The tests are designed and normed so that assessors can come up with a range of scores in which the student is likely to fall on 95% of attempts to test.
The 3-Ring Renzulli Way: google Three ring and Renzulli. Argue that your daughter's combination of ability and task commitment make her a natural candidate for gifted services.
