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ONE
​Author: Kathryn Otoshi​
​Illustrator: Kathryn Otoshi​

Number of pages: 32
Publisher: KO Kids Books (USA)​
First published in: 2008 
Format: Picturebook 

Is the mathematical focus explicit in the story? No
Is this story part of a mathematics story series? Yes (Kathryn Otoshi's Number Books)

Click here to ​preview and/or purchase this book via the Amazon (UK) website 

Synopsis by the author/publisher
Blue is a quiet color. Red’s a hothead who likes to pick on Blue. Yellow, Orange, Green, and Purple don’t like what they see, but what can they do? When no one speaks up, things get out of hand — until One comes along and shows all the colors how to stand up, stand together, and count. As budding young readers learn about numbers, counting, and primary and secondary colors, they also learn about accepting each other's differences and how it sometimes just takes one voice to make everyone count.

“Then everyone felt ... a little blue. Until One came. He had a different shape with bold strokes and squared corners.”

Recommended age range: 
4 years old + 

Relevant mathematics topics: 
Number Recognition

​Possible teaching activities:
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