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# Sir Cumference and the Dragon of Pi : A Math Adventure

## by Cindy Neuschwander

 Members Reviews Popularity Average rating Mentions 556 13 17,187 (4.12) 4
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One of King Arthur's knights is turned into a dragon and the knight's son 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. 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. ( )
LMHTWB | Jan 19, 2013 |
This book is another one in a series that uses a fictional story to explain a mathematical concept. In this story a man drinks a potion to alleviate his heartburn only to realize he is turned into a dragon. His only hope is his son who has to find the answer to a riddle to save his father. The answer to the riddle ends up being the number pi. As a teacher, I would use this book as a way to develop the students conceptual understanding of the number pi as the ratio between the circumference and diameter. I would use this book to introduce the concept and then stop once we arrived at the challenge on the circle's measure. At this point, I would have my students measure the circumference and diameter of various objects and find the ratio of the two quantities. After realizing the ratio is constant and the number pi, I would finish the lesson with the book. Once again, the pictures are a wonderful addition to the story. ( )
kgeorge | Nov 16, 2012 |
New Copy
npedcmc | Oct 31, 2012 |
This was the story of Sir Cumference and his son, Radius. The illustrations, which are by Wayne Geehan, are truly beautiful. I could imagine a child staring at the pages, being able to figure out the story from just the pictures. Though the story was fictional, it was a great way of explaining the mathematical concept of “pi.” ( )
chelsea6273 | Jan 29, 2012 |
This adventurous book would be enjoyable for upper elementary level students because it puts a fun spin on another difficult math concept. This book talks of how a group from the medieval times must use the formula for pi to solve all of their problems!
mgcook1 | Oct 19, 2011 |
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When Sir Cumference drinks a potion which turns him into a dragon, his son Radius searches for the magic number known as pi which will restore him to his former shape.

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## Rating

Average: (4.12)
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