Well, it does appear odd that she did not score in the top 25% (25 out of 100 students) given her other standardized test scores. However, unless there is a history of successful appeals, this may be ifficult to appeal because the school is using a clear numerical cutoff (75%). Is your DD strong in the verbal areas as well or is there a language barrier? If this unit is short (less than 3 weeks), I would probably focused on getting a copy of her test and figuring out why she scored so low and how to avoid the result for the next unit. If this will keep your DD out for a long time, I would bring all the test scores you have and mentioned your math backgrounds and pushed to get your DD into the math lessons, even if you have to go up to the principal.