Thanks for the replies. I didn't realize ALEKS started at 3rd grade level--sounds like it might be too advanced for DD5 right now. She just started doing Accelerated Math at school last week--scored 89% on her first work, which was at 2nd grade level. But it sounds like AM is much easier than ALEKS, and a whole different type of system with the multiple choice format.
I think I'll have DS7, who is in 3rd grade, check out ALEKS with the free trial and see how it goes for him.
Ania, that is great that your school got ALEKS on your recommendation!