**This is not just another counting book.** In this book you must look carefully at the pictures. You must count. And count again.

**This is a counting book with a difference.**What is the difference? The difference is what is left over when you subtract one group from another group.

**Why else is this a counting book with a difference?**Because besides counting, you must read and look and think, too. Because there are many things to discover and puzzle out. Because this book is fun!

Paul Giganti, Jr., teaches mathematics to teachers at the University of California at Berkeley. He is himself a graduate of UC Berkeley, with a degree in mathematics, and he taught in the public schools for fifteen years. He lives with his family in Albany, California.

Donald Crews is the renowned creator of many celebrated childrens books, including the Caldecott Honor Books Freight Train and Truck. He and his wife, Ann Jonas, live in New Yorks Hudson River Valley.

Donald Crews es el renombrado autor de dos libros merecedores del premio Caldecott, Tren de carga (Freight Train) y School Bus. Vive con su esposa, Ann Jonas, cerca del Río Hudson, en Nueva York.

Paul Giganti, Jr. instructs instructors in mathematics at the University of California, Berkeley. He himself holds a mathematics degree from UC Berkeley and spent fifteen years working as a public school teacher. He lives with his family in Albany, California.

Donald Crews is a well-known author of two books that won the Caldecott Prize: School Bus and Tren de carga (Freight Train). Establece su casa con Ann Jonas en Nueva York, cerca del Río Hudson.

This is a counting book with a difference. What is left over after deducting one group from another is what constitutes the difference.

This is not just another counting book. In this book you must look carefully at the pictures. You must count. And count again.

For what other reason is this a unique counting book? Because in addition to counting, you also need to read, look, and think. Because there are many things to discover and puzzle out. Because this book is fun!.

An unseen narrator notes and compares numbers of objects within predetermined sets during the course of a school day: “On the playground I saw girls and boys playing and I wondered: How many girls were there? How many boys were there? How many more girls than boys were there?” Of course, subtraction is the relevant operation in this case, and viewers have plenty of practice with a dozen spreads that have identical set-upswith the exception of the specific items compared. Sadly, not all of Crews’ line-and-watercolor illustrations are accurate enough to produce unquestionable results. For example, lumpy hands that could be mistaken for gloves could distort the comparison between the hats and the comparison of gloves; van-like vehicles could be mistaken for trucks in the parking lot; it’s hard to know what to make of the broken eggshells when chicks and eggs have to be compared. Open-minded mathematicians won’t be bothered by this, but children who require reassuring predictability in their arithmetic will find it unsettling. Additionally, the repetitive format has the skill-and-drill feel of a textbook with prettier pictures, which could be very helpful to teachers who wish to use this in a classroom. How many books about math are fun, how many are useful, and how many are more useful than fun? Copyright © 2005 The University of Illinois Board of Trustees