kitchen table math, the sequel

My sister is studying animal science, and she failed chem last year. She's only got one more chance to retake it (next semester) before she fails the course. So she wants to get started on it so that she can pass this time round.

I thought there was a Saxon Chemistry (after all, there is a Saxon Physics) but there isn't. Julie really liked the fact that you're always practicing what you've done before, as while she is incredibly smart she has memory problems. So she can learn it all, but unless it is practiced to automaticy she's got less chance than an average learner, because she's got no memory.

So, what are some good books for her to use? I don't know how mathematically heavy the course is, but probably not very. But we need some materials that she can work on alone and learn enough chem to pass and hopefully enough to pass well.

Any ideas?

Samantha (aka Sam-is-mad)