Happy Pi Day to You! All About Measuring Circles by Bonnie Worth

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Happy Pi Day to You! All About Measuring Circles (Cat in the Hat’s Learning Library) by Bonnie Worth, illustrated by Aristides Ruiz and Joe MathieuHappy Pi Day to You features The Cat and the Hat who helps introduce circles and pi to a few children using rhymes (which follow the ABAB pattern). A few of the rhymes are forced, but it does read well as a read-aloud book.

The Cat teaches where circles can be found; how to make a circle with two sticks and a string; the definition of diameter, radius, circumference; and how to find pi. The last third of the book talks about pi history and who helped “discover” pi. A glossary and list of websites to visit then follow the story.

Students can use the concepts from the demonstration in the book to make their own circles using pencils and string.

Reviewed on February 1, 2023

About the author 

Rebecca Reid

Rebecca Reid is a homeschooling, stay-at-home mother seeking to make the journey of life-long learning fun by reading lots of good books. Rebecca Reads provides reviews of children's literature she has enjoyed with her children; nonfiction that enhances understanding of educational philosophies, history and more; and classical literature that Rebecca enjoys reading.

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