The World's Tallest House of Cards and Other Number Records

Simple rhyming text and color photographs describe subtraction.

In the first book of the Math Is Categorical® series, readers will become familiar with the concept of addition and its key terms. The author and illustrator of the best-selling Words Are CATegorical® series use their trademark sense of humo...

Simple rhyming text and color photographs describe patterns.

Simple rhyming text and color photographs describe addition.

The animal kingdom is packed with information. Join Graph Giraffe as he collects data at a pet store. Learn how analyzing data helps you see information in new ways.

Have you ever wondered how to measure your pizza, or how much ice cream is in your ice-cream cone? Basic principles of geometry, including measuring two-dimensional and three-dimensional shapes, attributes of various shapes, and formulas for finding...

Have you ever wondered how astronauts float in space, or how your pizza gets from your plate to your mouth? Basic principles of physics, including learning about distance, displacement, speed, velocity, acceleration, forces, friction, gravity, and N...

Looks at a different category of musical instrument and shows how they are played around the world.

Are you ready for a sorting safari? Join Graph Giraffe as he organizes animals in the African savannah. Learn how sorting helps you see information in new ways.