Mathematics--Geometry
#### 47 Reviews

(2)
K-3
Illustrated by
Jon Klassen.
While playing hide-and-seek with Square (*Triangle*; *Square*), Triangle breaks Circle's rule about not hiding behind the waterfall. Annoyed, Circle follows him into a dark cave until only expressively drawn eyes are visible. An unknown third pair causes the friends to flee, with philosophical Circle wondering what shape it was. Klassen's understated work with light, shadow, and texture in the graphite, watercolor, and digital illustrations carries Barnett's highly entertaining story full...circle.

Reviewer: Elissa Gershowitz
| Horn Book Magazine Issue:
March, 2019

(3)
PS
Illustrated by
Chris Chatterton.
A dog who happens upon some wooden blocks in various geometric shapes sets out to use them to create a bed; the dog's narration, addressed to its stuffed bear, offers a blow-by-blow of the task's progress and setbacks ("Oh no. There is only 1 rectangle block. Yikes!"). The spick-and-span art keeps the reader's focus on the clearly articulated math concept.

Reviewer: Nell Beram

(3)
K-3
Illustrated by
Edward Miller.
After introducing the special quadrilateral known as a square, Adler and Miller's latest collaboration veers off on a surprising and completely worthwhile tangent to explore, in depth, how a quadrilateral's angles always add up to 360 degrees. The usual suspects--rectangles, parallelograms, rhombuses, trapezoids, kites--are then defined. Engaging activities and easy-to-understand illustrations make this a solid follow-up to *Circles* and *Triangles*. Glos.

Reviewer: Tanya D. Auger

(2)
K-3
Illustrated by
Jon Klassen.
In a companion book to *Triangle*, Square pushes square boulders to a hilltop. Seeing a resemblance between Square and the block he's pushing, his friend Circle calls Square an artistic genius. Before Square knows it, he's agreed to create a sculpture in Circle's likeness. Angled lines and white space direct readers' eyes across each page, and short sentences, smart dialogue, and word repetition keep the story steadily moving.

Reviewer: Elisa Gall
| Horn Book Magazine Issue:
July, 2018

(3)
K-3
Illustrated by
Todd Stewart.
This lyrical introduction to patterns found in nature eschews formal definitions (the term *fractals*, for example, is never used). Instead, Barss's focus is on encouraging children to explore and ask their own questions about branching river systems, spinning planets, and spiraling seashells. Eye-catching patterns abound in Stewart's texture-rich illustrations, rendered with silkscreen printing and digital media. Reading list.

Reviewer: Tanya D. Auger

(3)
K-3
Master Math series.
Illustrated by
Jo Samways.
Clear and colorful, these introductory math books feature hands-on and picture-based activities using the Singapore math approach, in which children progress from concrete to pictorial to abstract understanding of concepts. The content is engaging and pedagogically progressive; many important activities (especially those requiring manipulatives) are described in "Parent and Teacher Guidance" sections, making the series best suited for classroom or homeschool use. Review covers these Master Math titles: *Get in Shape*, *Get to Know Numbers*, *Measure Up*, and *Super Calculations*.

Reviewer: Tanya D. Auger

(3)
PS
Illustrated by
Serge Bloch.
The strength of a man's sneeze sends Circle rolling and Oval rocking (bypassing Rectangle, fortunately), and so on until Circle pops on Triangle's point, after which the chain reaction continues. Equally graceful as the rhymes are the simple collage and ink illustrations showing the bespectacled, stick-limbed shapes collaborating on this book-length geometry problem.

Reviewer: Nell Beram

(2)
K-3
Illustrated by
Jon Klassen.
Triangle leaves his triangle-shaped house via his triangle-shaped door, off to "play a sneaky trick on Square." But thanks to geometry, Square gets the last laugh. Fans of this author-illustrator team will recognize elements such as sumptuous textures and expressive eyes, not to mention a pesky antihero and a chase scene that goes in one direction, then back--plus an open, ambiguous ending.

Reviewer: Elissa Gershowitz
| Horn Book Magazine Issue:
May, 2017

(3)
K-3
Illustrated by
Bob Shea.
Square is a bookworm; Circle likes to "bounce into the action." Nevertheless, they've been best friends "since they were a dot and a speck." When flashy newcomer Triangle arrives, a "wedge" is driven between them, as described in Colleen's clever, math-centric text. Shea's geometric illustrations give the spindly-legged characters lots of personality.

Reviewer: Elissa Gershowitz

(4)
K-3
Crayola Concepts series.
These simple concept books serve as introductions to their topics as well as to nonfiction conventions. Crayon-bright pages pop with colorful graphics and photos that illustrate concepts in the texts; some volumes are more focused than others. Despite its obvious marketing for the Crayola brand, overall the series is an engaging foray into basic early-elementary subjects. Reading list, websites. Glos., ind. Review covers these Crayola Concepts titles: *The Crayola Counting Book*, *The Crayola Patterns Book*, *The Crayola Shapes Book*, *The Crayola Comparing Sizes Book*, *The Crayola Opposites Book*, and *The Crayola Sorting Book*

Reviewer: Kitty Flynn

(3)
K-3
Illustrated by
Edward Miller.
After differentiating a circle from its 3-D relatives (spheres, cylinders, cones), Adler provides step-by-step directions for drawing the 2-D shape and its various parts (diameter, radius, sectors, etc.) and for measuring its circumference and area. Clear visuals reinforce activity instructions, geometry terms, and concepts (e.g., *pi*). Friendly animal illustrations provide opportunities for identifying specific circle parts. Answers to the activities are appended. Glos.

Reviewer: Tanya D. Auger

(3)
K-3
Illustrated by
Eric Comstock.
Child sleuth Charlie must find a classmate's missing cone-shaped princess hat, which she needs for that evening's school play. The authors offer an easy-does-it introduction to three-dimensional geometric shapes without derailing the story's mystery engine. The art is retro-style with a twist: Charlie has a pie-chart torso, and the cast's skin colors include purple and blue. Activities and a seek-and-find challenge are appended.

Reviewer: Nell Beram

(4)
K-3
Mouse Math series.
Illustrated by
Deborah Melmon.
Mouse siblings Albert and Wanda find a shoe in the People's yard and want to bring it into their playroom--will it fit? Albert has a birthday party and gets presents of all shapes and sizes. Accompanied by cheery illustrations of friendly mice, the stories are unsubtle but effective vehicles for introducing nonstandard units of measurement (*Shoe*) and 3D shapes (*Wish*). Activities appended. Review covers these Mouse Math titles: *If the Shoe Fits* and *Make a Wish, Albert!*,

Reviewer: Katrina Hedeen

(3)
K-3
Illustrated by
Edward Miller.
A couple of kids and a pair of robots host this personable introduction to triangles. The usual classroom terms (*vertex*, *congruent*, etc.) are presented in bold and clearly defined; Adler gets readers to live the geometric magic by encouraging them to make angles with their arms and fingers. The flat, bold illustrations are, yes, geometric but not without flair.

Reviewer: Nell Beram

(4)
K-3
Illustrated by
Ashley Barron.
Two-page spreads, illustrated with pleasing cut-paper collage, link animals' activities to geometry concepts. For example, "Would spiders weave webs to spin silken scenes?" is paired with questions about finding shapes therein. The prompts and activities range widely in difficulty and the book's assertion--"So...does nature know numbers? No way!"--is confusingly explained. Animal facts are appended.

Reviewer: Tanya D. Auger

(4)
K-3
Illustrated by
Shennen Bersani.
A rhombus-torsoed mom and a rectangle-torsoed dad have a baby who resembles "both of her parents. She had four right angles *and* four equal sides." Geometrically varying relatives suggest names ("Parallelogram," "Quadrangle," etc.), but the giddy reader knows from the get-go that "Square" is the answer. The story is enlightening but uses nothing by way of artistry to get there. Activities are appended.

Reviewer: Nell Beram

(3)
K-3
They're *baaaack*--and that's a good thing. The five birdbrained duck brothers return to present three different "amazing feats" of geometry. Each feat features *W*-centric alliteration and Looney Tunes–esque slapstick via cartoony panels. One feat is not for the fainthearted: when Walter participates in "Partitioning Rectangles into Two and Four Equal Shares," *he* ends up in four equal wedges.

Reviewer: Nell Beram

(3)
4-6
Illustrated by
Bill Slavin.
Upper-elementary math fans (and teachers) will enjoy the many hands-on activities in this compilation of Ross and Slavin's three earlier books about squares, triangles, and circles--and their related solid shapes. Numerous details (historical, architectural, geographical, etc.) are woven in among the projects and games--some of which are quite challenging (e.g., making a sundial). Chapters include diagrams and cartoonlike illustrations. Glos., ind.

Reviewer: Tanya D. Auger

(4)
4-6
Easy Genius Math series.
These serviceable retitled books are primarily designed for upper-elementary and early-middle-school students who need help with fundamental math skills and concepts. Each volume covers twenty-eight topics, with one topic per double-page spread. The pages are overcrowded and the cartoonlike illustrations resemble clip art, but the math content is comprehensive, and the instructions, examples, and definitions are clear. Reading list, websites. Ind. Review covers these Easy Genius Math titles: *Algebra and Pre-Algebra*, *Decimals and Fractions*, *Division and Multiplication*, *Geometry*, *Ratios and Percents*, and *Subtraction and Addition*.

Reviewer: Tanya D. Auger

(4)
4-6
Checkerboard How-To Library: Cool Art with Math & Science series.
Color photographs and diagrams combine with simple texts to explain the featured mathematical or scientific concept. Brief introductions to the topics are followed by four art projects that turn theory into practical application. Sidebars provide supply lists, applicable terms, and photographs to complement the step-by-step instructions. The overuse of exclamation points in the texts is unfortunate. Glos., ind. Review covers these Cool Art with Math & Science titles: *Cool Flexigon Art*, *Cool Optical Illusions*, *Cool Paper Folding*, and *Cool String Art*.

Reviewer: Tamara DePasquale

47 reviews