Does she really like math? Does she want to do as much math as she can, or is she trying to be in the top classes? Does she like sciences or prefer other types of classes? I know it is too soon for her to decide her college path (I was vehement about taking minimal science as a HS freshman and got an Honors Chemistry degree as an undergrad) but does math take her away from subjects she prefers? Some kids go for the top tracks just because they feel they need to.
Since math builds on previously learned material this summer she could learn her weak areas more thoroughly than she did during the school year. She also could train herself to look for errors and silly mistakes. My college honors math major son did horribly with flash cards in early elementary school- not his thing. But by now your D is learning more concepts than just arithmetic facts. She needs to own them. It is up to her if it is worth the effort to go from a barely A to a top A student in math.