McKellar's newest book on pre-algebra is designed to help those teens struggling with math. The book is broken down into five manageable sections: numbers; variables; x; exponents; and functions. Each section has several chapters focusing on parts of the theme, and chapters features step-by-step instructions, tips and tricks, and practice problems. Throughout the text are testimonials from successful women who use math in their jobs and McKellar's diary segments, with stories from her teenage life. One might ask, "How is this book any different from the math books that schools and libraries already have?" McKellar understands teens. She speaks their language. She gives practical examples that have meaning to teens. And honestly, she makes math fun. Anyone who can do that has a hit on her hands. There are only two drawbacks to this book. The examples and conversations McKellar has with the reader are very girl oriented, which is part of her goal of making more girls comfortable with math, but may turn off boy readers. The second drawback is that teens will only pick it up if they are struggling. If this book was used as supplemental material in a class, more teens would be forced to try it and learn that her tips are worthwhile. As one who uses calculators to do simple addition, this reviewer learned something.-Kristin Fletcher-Spear.