When I emailed the AoPS people about what book my son in Algebra II should try, they suggested the Algebra I book to my surprise. It covers a lot of what is in both Algebra I & Algebra II. And for him the number theory book. If you are comfortable with helping her with the work, I might suggest just buy the Pre Alegra book and try working through parts of it in prep for the Algebra I class next year. AoPS approach is a bit different and more about abstract thinking vs. just following a bunch of instructions.
