It still seems like the ALEKS program is a good and inexpensive method of preparing for a CLEP/DSST/ECE exam. $20/month is much cheaper than a college-level textbook, and competitive with other test prep materials. And since the same $20/month covers all the different courses, it becomes a really good deal if you are taking more than one covered exam. (Gee, I wonder if there are any other sites that give you access to test prep covering multiple subjects for $20 a month?
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-Gary-