To Build On . The third reason is that one of your kids needs help in math. To a large extent, the book's success derives from the the fact that the authors are not professional mathematicians. They haven't forgotten how ordinary people can struggle with math. By doing the exercises and memorizing the formulas for triangles, circles, and fractions, users are sure to raise their quality control.
Icons are everywhere.
There is a real need for this kind of straightforward and practical math book. Logically organized, starting out with fractions and decimals before moving on to geometry and trigonometry. If this book were on your shelf, it would be the first one you'd grab when you were having number troubles.