They have three CD's - Trigonometry, Intermediate Algebra, and Introductory
Algebra. Also most Text boxes provide something now days. One of the
"better" CD's {I say this very carefully} is The Study Companion by
Houghton Mifflin Company for the Larson * Hostetler College Algebra text. I
have found that most leave much to be desired in general. As a basic skill
tutor they are ok. Teaching "real" mathematical understanding is much more
labor intensive in my experience.
Vern Kays
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