Her processing speed scores are in the range for which my institution has successfully obtained extended time for the SAT and ACT. If she has been just able to complete the AP tests within the standard time, she probably does not need 100% extended time (which, in my experience, some students find to be diminishing returns, because of the overall length of time in the testing room). 100% also requires finding and paying for a test proctor, whereas 50% extended can be handled by most regular test sites.
Things to consider:
1. Essay is not required on either the SAT or ACT conventional exams. SAT has changed the essay so many times in the past several years that it has limited predictive utility for admissions purposes anyway.
2. Some portions of the tests allow calculator anyway. Her reasoning appears to be stronger than her computations, which in turn is better than her automaticity. I expect she will be fine for those parts. It might be helpful to try the sample test on line, and see how much of it really requires a calculator (not as much as you might think; my kids barely touched their calculators on the SAT, and one of them has fairly low fluency of all kinds). If she does okay on the practice test, keeping in mind that she still has a few years of high school to go, that might be reassuring.
Does she feel like she now has enough information to understand her own learning better, especially in math?
