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Title: 1st diagram I saw was incorrect
Review: I am homeschooling my son, so I bought this book as a way to make Algebra easier for him. He's only in third grade, so I don't need it yet. However, I was explaining something to him regarding a calculation and wanted to see how the book would describe it. I thumbed thru the book and the first diagram I saw was on page 31. It was of the different number systems. It incorrectly showed that irrational numbers are a subset of rational numbers. I was a math major in college and know otherwise. Also, the book describes it otherwise. Because of this - the first thing I saw, now I'm questioning the whole series. Sad.
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