Hmmm. That sounds interesting. Have you seen those computer programs on CD-Rom that cover Math from Pre-Algebra through Trig? We've never gotten one because Sir Suzi Q can handle the Math all the way up to AP Calculus, but it looks like it would be just the thing for a student whose parents weren't quite sure about the Math.
High School Self Taught (4 Vol) currently at $39.95 ending Aug. 1.