Less Than Zero

Less Than Zero is perfect for teaching negative numbers to second, third, and fourth graders. Perry the Penguin needs 9 clams to buy an ice scooter—but he's not very good at saving. As Perry earns, spends, finds, loses, and borrows clams, a simple line graph demonstrates the concept of negative numbers.

Kids will love the story and the illustrations by Frank Remkiewicz. Parents and educators will love how the story and pictures make understanding the math concepts a breeze—as well as the concrete examples of how math works. The book contains activities for adults to do with kids to extend math into their own lives.