Happy Pi Day to You! All About Measuring Circles

Illustrated by Aristides Ruiz, Joe Mathieu
Look inside
Laugh and learn with fun facts about the history of pi, measurements, theorems, and more—all told in Dr. Seuss’s beloved rhyming style and starring the Cat in the Hat!

“It is all about circles and measuring fun. So put on your Pi Hats! Let’s start, everyone!”

The Cat in the Hat’s Learning Library series combines beloved characters, engaging rhymes, and Seussian illustrations to introduce children to non-fiction topics from the real world! Go on an adventure with the Cat in the Hat and learn:

  • how to measure and draw circles
  • how pi is a number so long that it never ends
  • how Ancient Egyptians used pi to help build the pyramids
  • and much more!

Perfect for story time and for the youngest readers, Happy Pi Day to You! All About Measuring Circles also includes an index, glossary, and suggestions for further learning.

Look for more books in the Cat in the Hat’s Learning Library series!
High? Low? Where Did It Go? All About Animal Camouflage
Is a Camel a Mammal? All About Mammals
The 100 Hats of the Cat in the Hat: A Celebration of the 100th Day of School
A Great Day for Pup: All About Wild Babies
Would You Rather Be a Pollywog? All About Pond Life
I Can Name 50 Trees Today! All About Trees
Fine Feathered Friends: All About Birds
My, Oh My--A Butterfly! All About Butterflies
Oh Say Can You Seed? All About Flowering Plants
Inside Your Outside! All About the Human Body
Ice is Nice! All About the North and South Poles
Bonnie Worth is the author of countless books for young readers, among them 18 of the Cat in the Hat's Learning Library books, including Oh Say Can You Say Di-No-Saur?, If I Ran the Rain Forest, Oh Say Can You Seed? (winner of the 2003 Ohio Farm Bureau Award), Hark! A Shark!, and If I Ran the Horse Show. View titles by Bonnie Worth
New Jersey native and "constant doodler" ARISTIDES ("Art") RUIZ has illustrated over 100 books for children—among them 40+ books in the Cat in the Hat's Learning Library series. A versatile artist, he divides his time between illustrating for children and fine art painting. View titles by Aristides Ruiz
Joe Mathieu has illustrated countless books for children, including Big Frank’s Fire Truck, Sesame Street titles, books in the Cat in the Hat’s Learning Library series, and many more. View titles by Joe Mathieu

Classroom Activities for Happy Pi Day to You! All About Measuring Circles

Classroom activities supplement discussion and traditional lessons with group projects and creative tasks. Can be used in pre-existing units and lessons, or as stand-alone.

(Please note: the guide displayed here is the most recently uploaded version; while unlikely, any page citation discrepancies between the guide and book is likely due to pagination differences between a book’s different formats.)

About

Laugh and learn with fun facts about the history of pi, measurements, theorems, and more—all told in Dr. Seuss’s beloved rhyming style and starring the Cat in the Hat!

“It is all about circles and measuring fun. So put on your Pi Hats! Let’s start, everyone!”

The Cat in the Hat’s Learning Library series combines beloved characters, engaging rhymes, and Seussian illustrations to introduce children to non-fiction topics from the real world! Go on an adventure with the Cat in the Hat and learn:

  • how to measure and draw circles
  • how pi is a number so long that it never ends
  • how Ancient Egyptians used pi to help build the pyramids
  • and much more!

Perfect for story time and for the youngest readers, Happy Pi Day to You! All About Measuring Circles also includes an index, glossary, and suggestions for further learning.

Look for more books in the Cat in the Hat’s Learning Library series!
High? Low? Where Did It Go? All About Animal Camouflage
Is a Camel a Mammal? All About Mammals
The 100 Hats of the Cat in the Hat: A Celebration of the 100th Day of School
A Great Day for Pup: All About Wild Babies
Would You Rather Be a Pollywog? All About Pond Life
I Can Name 50 Trees Today! All About Trees
Fine Feathered Friends: All About Birds
My, Oh My--A Butterfly! All About Butterflies
Oh Say Can You Seed? All About Flowering Plants
Inside Your Outside! All About the Human Body
Ice is Nice! All About the North and South Poles

Author

Bonnie Worth is the author of countless books for young readers, among them 18 of the Cat in the Hat's Learning Library books, including Oh Say Can You Say Di-No-Saur?, If I Ran the Rain Forest, Oh Say Can You Seed? (winner of the 2003 Ohio Farm Bureau Award), Hark! A Shark!, and If I Ran the Horse Show. View titles by Bonnie Worth
New Jersey native and "constant doodler" ARISTIDES ("Art") RUIZ has illustrated over 100 books for children—among them 40+ books in the Cat in the Hat's Learning Library series. A versatile artist, he divides his time between illustrating for children and fine art painting. View titles by Aristides Ruiz
Joe Mathieu has illustrated countless books for children, including Big Frank’s Fire Truck, Sesame Street titles, books in the Cat in the Hat’s Learning Library series, and many more. View titles by Joe Mathieu

Guides

Classroom Activities for Happy Pi Day to You! All About Measuring Circles

Classroom activities supplement discussion and traditional lessons with group projects and creative tasks. Can be used in pre-existing units and lessons, or as stand-alone.

(Please note: the guide displayed here is the most recently uploaded version; while unlikely, any page citation discrepancies between the guide and book is likely due to pagination differences between a book’s different formats.)

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