If she's not in high school I wouldn't worry too much. I essentially missed half of third grade, all of 4th and 5th grade and half of 6th grade, and by 8th-90th grade I was pretty much caught up completely without even a real catch up program. A lot of the stuff your learn at that age simply becomes trivial or at least much much easier just from getting older. In that case, I'd just give her some puzzles to solve or something.

If she is in high school the only answer is probably a bunch of "homework", good books on the subject, and there are also hundreds of video courses online.