(4) K-3 All Aboard Math Reader series. Illustrated by Tamara Petrosino. For their cat show, some kids think of ways to group their ten cats--by size, by eye color, etc.--but there's always a disruption within the groupings, and the kids have to think of another way to classify the cats. Finally, all ten wear themselves out chasing a mouse and fall asleep. The flat cartoons make the groupings clear, and, although the plot is clunky, the simple language makes the sorting concept accessible.

Reviewer: Anita L. Burkam