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Polly’s Pen Pal - MathStart 3 - Metrics

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Is this book about a real woman in STEAM?

Polly's new pen-pal, Ally, lives in Montreal, Canada, where they use the metric system. Polly and Ally have lots in common: They both have cats, like the color purple, and are just about the same size and weight. But when Ally writes that she is 125 centimeters tall, Polly needs to ask her Dad for help to figure out how tall that really is. Dad uses a baseball bat about 1 meter—100 centimeters—long as a reference, and shows Polly that one centimeter is about the width of his little finger. Dad helps Polly figure out grams and kilograms, and meters and kilometers, also by using every day references she can relate to.

The use of rough equivalents in terms of familiar objects and distances helps kids become familiar and comfortable with the metric system.

MathStart is an award-winning series by Stuart J. Murphy that teaches math through stories and visual models. Young readers find the stories engaging and relatable, because each story revolves around practical applications of the math concept being presented and features lively art from top-notch illustrators.

Charts and other visual representations help children understand how the math works and promote deeper comprehension. This unique combination of stories, illustrations, and visual models helps teachers and parents in the teaching of math and provides all children with the opportunity to succeed.

The 63-book series is divided into three levels with 21 books in each. The math concepts taught in MathStart books conform to state and national standards. Level 1 is Pre-K–Kindergarten; Level 2 is Grades 1–3; Level 3 is Grades 2–4. The series follows math topics across grades so there is a foundational path to learning that runs through the levels.

Screen Shot 2021-01-22 at 12.09.52
Screen Shot 2021-01-22 at 12.09.52
Screen Shot 2021-01-22 at 12.09.52


Stuart J. Murphy


Rémy Simard



Recommended Ages:

6 - 10 years


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For ages 12 and under

Parent Permission Required

For ages 13-17

For ages 18 & Above

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