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Children's Nonfiction Size & Shape

Sizing Up Winter

by (author) Lizann Flatt

illustrated by Ashley Barron

Owlkids Books Inc.
Initial publish date
Aug 2018
Size & Shape, General, Seasons, General
Recommended Age
5 to 7
Recommended Grade
k to 3
  • Paperback / softback

    Publish Date
    Aug 2018
    List Price
  • eBook

    Publish Date
    Jan 2014
    List Price

Classroom Resources

Download Teacher’s Guide

Download Teacher’s Guide

Download Student Activity

Where to buy it


As young readers journey into the natural world, they will discover that numbers, patterns, shapes — and much more! — can be found in everyday plants and animals.

What if animals and plants knew math, just like us? Would snowflakes all fall from the same height in the sky? Would otters spread themselves evenly across lakes? Would groundhogs be aware of the date? In Sizing Up Winter, the third title in the Math in Nature series, nature comes to life to help children grasp concepts of time and measurement.

About the authors

LIZANN FLATT has written many information books for children, including The Nature Treasury and Let’s Go! A former editor of chickaDEE Magazine, her children’s writing has won many honors, including a Distinguished Achievement Award from The Association of Educational Publishers. She lives in Muskoka, ON.

Lizann Flatt's profile page

ASHLEY BARRON’s vibrant cut-paper collage illustrations appear in more than twelve picture books, including Chaiwala! by Priti Maheshwari, My City Speaks by Darren Lebeuf (winner of the Schneider Family Book Award), City Baby by Laurie Elmquist (a Bank Street Best Book of the Year) and Pretty Tricky by Etta Kaner (a Kirkus Best Picture Book and an Outstanding Science Trade Book). Ashley lives with her partner and three cats in Toronto, Ontario.

Ashley Barron's profile page


  • Commended, Canadian Children's Book Centre Best Books for Kids and Teens, STARRED SELECTION

Editorial Reviews

"This interesting book uses the winter season to demonstrate different ways of measuring... A great introduction of math concepts to very young children."

Youth Services Book Review

"Sizing Up Winter expands upon the number sense and numeration skills learned in the previous "Math in Nature" titles and invites readers to reflect on patterns and shapes in nature through interactive measurement problems."

CM Magazine

"Third in the "Math in Nature" series, Sizing Up Winter exhibits elegant, lacy collage art illustrations in tandem with poetic prose propositions that imagine the presence of math and number concepts in nature."

Children's Bookwatch

"Ashley Barron's cheery cut-paper collage illustrations make this book inviting to young eyes, and the author's appended "Nature Notes" offer tantalizing thumbnail descriptions of some of the more northerly animals"

Books For Kids Blog

Children who peruse the illustrations carefully and welcome the challenge of problem solving will enjoy this book.

School Library Journal

"This terrific series provides cross-curricular activities for K-2 classrooms and non-formal learning environments."

Green Teacher Magazine

Barron's stunning cut-paper collages are the highlight of the book, while backmatter provides a paragraph of information about each of the featured creatures. When read with a caring adult, this may challenge readers to look at measurement in a different way.

Kirkus Reviews

Other titles by Lizann Flatt

Other titles by Ashley Barron