Dear master of none,
I don't know anything about ALEKS, but we use and really like the Mathematics Enhancement Programme from the Centre for Innovative Mathematics Teaching at the University of Plymouth. I don't know how well a UK programme would correlate with an American course of study, but the math is very challenging and interesting.
The materials are free; all can be printed off as PDFs, while some of it is also available as interactive, online work. There are workbooks, lesson plans, tests, suggestions for extensions (games, real-life applications of various topics, etc.); we have found it an excellent, enjoyable resource.
It's at
www.cimt.plymouth.ac.uk/projects/mep/default.htm .
Hope that helps!
peace
minnie
