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.

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.

Shark SwimathonThe Ocean City Sharks have to swim 75 laps by the end of the week, and every day they figure out how many laps are left to go. Swimming and subtraction are all part of the fun!

Josh is the best collector on the block. And now he has something new to collect - rocks! Soon Josh and his best friend, Amy, have so many rocks they need to organize their collection. But how? Young collectors will be fascinated by all there is to know about rocks and about classifying - sorting and organizing objects by attributes like color, shape, or size. Grab your rock hammer and join the fun with this entertaining story by Stuart J. Murphy and lively art by Cat Bowman Smith.

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.

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!

Carlos learns the importance of washing his hands.