Book Review: Sir Cumference and the Dragon of Pi

Sir Cumference and the Dragon of Pi by Cindy Neuschwander, illustrated by Wayne Geehan
ISBN:  9781570911668

One of King Arthur's knights, Sir Cumference, is turned into a dragon and the knight's son, Radius, must find the right potion and proportion to turn his father back to human, before the dragon is killed. This children's book for grades 2-5 explains the relationship between the number pi (3.14159...), the diameter of a circle, and it's circumference.

While the writing is find, the math is find, and the illustrations are okay, I did not care for this book. It was very tightyly focused on one fact about pi and it's a fact that would lack spark to many students.  There are many other facts about pi that could have been introduced. Unlike Sir Cumference and the First Round Table, the illustrations are just there but not especially helpful at clarifying the relationship.  Additionally, the entertaining puns were sadly absent.  

This is the second in a series of children's math books by Cindy Neuschwander, called A Math Adventure.  While I had intended to buy all of six plus some of her other books, this one is making me rethink that.  I really would like to see the others before I blindly buy more.  What a pity -- could use more fun math children's books.

Book Review: Sir Cumference and the First Round Table

Sir Cumference and the First Round Table by Cindy Neuschwander, illustrated by Wayne Geehan
ISBN: 9781570911521

King Arthur is convening his knights for the first time, but there is a problem -- the table.  Sir Cumference takes it upon himself to solve the problem. 

This children's book helps children in grades 2-5 see the connections between various polygons and a circle. The properties of each polygon are used in the story. Mathematically it is sound and the author does explain the material in a very nice child-friendly manner. Adults will enjoy the plethora of puns. 

My only complaint is the colors in the illustrations is a bit too wild -- tone down some of the contrasts would help the appearance. ( )

As a high school math teacher, I do use this book to reinforce the properties of various polygons, because it is accurate and because even teenagers like to be read to.  I also show it to students a good example of a math book for children and then I assign them the project to make their own story book on a math topic.  While it is easy to create simple and engaging counting books for lower grades, my students begin to appreciate for much work and thought goes into presenting high school math while entertaining an audience.