NONFICTION

The Times Machine!: Learn Multiplication and Division...Like, Yesterday!

by Danica McKellar (text) & illus. by Josée Masse
Crown. Jun. 2020. 232p. Tr $22.99. ISBN 9781101934036; pap. $19.99. ISBN 9781101934029.
COPY ISBN
Gr 2-4–McKellar’s follow up to the successful math book, Do Not Open This Math Book, focuses on multiplication and division. Using methods from the Common Core State Standards, the math is described in easy-to-understand pictures and examples. McKellar provides methods for memorizing the times tables, but more importantly, explains in numerous ways why and how multiplication and division work. Colorful, simple illustrations fill most of the book; random historical facts break up the math and provide real-life scenarios. Some of the explanations are a bit confusing or superfluous, but the majority of the text is accessible and very useful to struggling students and those working ahead. Concept reviews, with plenty of practice problems, conclude each section.
VERDICT While this title is confusing at times, it guides students through the entirety of multiplication and division taught in second through fourth grade. Some lessons may help struggling students grasp the concepts not understood in class and teach younger students who are working ahead. Suggested for most libraries.
Reviewed by Katherine Rao, Palos Verdes Library District, CA , May 01, 2020

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