Are you planning to put her in a class, or to use the Introductory Algebra book? If the latter, I'd just dive in and prepare to go slowly where necessary. If a class, I'd be more cautious. I doubt she'll be bored either way. I second 22B re Alcumus. Many problems there count for both prealgebra and algebra anyway, btw.
PS you could compromise and put her in Prealgebra 2; also, might be worth asking about the possibility of swapping her down if the first few weeks do turn out too hard; there are enough prealg classes that they probably have that flexibility.
Last edited by ColinsMum; 05/11/14 11:11 PM. Reason: ps