I understand what you're going through. My 8th grader has a really hard time completing in-class writing assignments because he writes so slowly, and doesn't use cursive. He is in all honors, and with high school just around the corner, I've become very concerned about the pace at which he writes. We've started the process to have some sort of accommodation put in place for him, that will be on file, and that will hopefully follow him into HS. (It's not just that he writes slowly, he has ADD and is a bit slower to process and organize his thoughts and get them on paper.)
It's a shame that they don't teach cursive in school anymore, or more accurately, they don't have time to teach it anymore. I'm sure it would make a difference. I try to encourage both my kids to practice, practice, practice, but it's just not a priority for them. Once again, I vow to have them practice a few minutes everyday this summer!!!
I would encourage you to speak to her school counselor to see if a written letter of accommodation can be put on file, as it is too late for an IEP or 504 to be started. It's possible she will be able to take this to the test with her and see if they will give her extra time, but it's probably a long shot.