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.

Polly's got a pen pal ... in Canada! Polly's sure that she and her new friend, Ally, will have a lot in common. When Ally writes that she's 125 centimeters tall and weighs 25 kilograms, Polly wants to know if she's the same. Polly wishes she could go and visit her -- but Ally lives 450 kilometers away! Young readers will learn about metric units like centimeters, kilograms, kilometers, and liters as they follow this story of two friends who can't be kept apart.

Comparing whole numbers and understanding what's more and what's less are a big part of Eddie's strategy in guessing people's ages at the school fair. Full color.

Max makes fun of Freda's shoes, but Freda soon learns how to cope with his bullying.

A drive to recycle cans on Earth Day teaches the children of the Maple Street School Save-the-Planet Club about place value.

It's the last week of Camp Grizzly, and the campers are preparing to elect a mascot. Each day the Grizzly Gazette takes a poll to see who has the biggest percentage of the vote so far. Is it Sophie? Is it Daniel? Or could it be Corey, the new entry in the race? Corey's determined to do her best. But she's got to make up for lost time. Can she win out over Daniel and Sophie? No one will know for sure until the last vote is counted! A lively story about summer camp fun will help young readers understand both percentage and voting!

Learn to graph while following the growth of T.J., an orphaned Siberian tiger cub who is hand-raised at the Denver Zoo. T.J. is a Siberian tiger cub born at the Denver Zoo. One day he stops eating. The zoo staff tries to tempt him with treats, but he refuses them all. The staff doesn't give up, and finally their love and persistence pay off. T.J. grows up to be a huge, healthy tiger. The delightful pictures of T.J. and the heartwarming story of his life will charm young readers as they learn the basic math skills of graphing in Tiger Math by Ann Whitehead Nagda and Cindy Bickel. Those who like storybooks can read just the right-hand pages of this book. But those who want to know more can use the graphs on the left-hand pages to see exactly how T.J. grew.