Just got the books in the mail. Not sure I should have bothered with the Algebra Book. There isn't much in book my son hasn't already covered in his Algebra Class. He is currently doing Logs & Exponents, But the Challenge problems look very good. The problems look easy at first, but when you start thinking about them not at all obvious. And there is no Trig in this book at all. The Counting & Probability book starts with material my son did last semester and gets more challenging.
I can see why these books would appeal to parents homeschooling their gifted kid. They seem very accessible to elementary school kids.
