Review of How to Two, by David Soman

How to Two

by David Soman

Dial Books for Young Readers, 2019. 36 pages.
Review written October 4, 2022, from a library book.
Starred Review

Counting books are a staple for parents to share with young children, and this is a beautiful one. You’re counting children playing!

First, we see one child launching off a playground slide, and the words read:

How to one.

That’s pretty much how the text goes. “How to two” shows two kids on a seesaw.

At six, there’s a rainstorm, and the six kids play duck, duck goose under a shelter. The kids go further afield as the numbers get bigger, with “How to eight” involving Hide-and-Seek, and “How to ten” being a grand game of tag.

As the sun sets and parents take all the kids home again, the numbers go back down more quickly. And I almost missed it — but the endpapers at the back show animals to go back and count for each number.

The art is beautiful, the kids are exuberant, and the book does the job of teaching counting from 1 to 10.

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penguin.com/kids

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Review of A Million Dots, by Sven Völker

A Million Dots

by Sven Völker

Cicada Books Limited, 2019. 44 pages.
Review written March 24, 2020, from a library book
Starred Review

Now you and your kids can both explore exponential growth!

The first spread of this book shows the numeral 1, the word one, and one dot – in this case, the graphic artist has made it the top of a tree.

The next spread: 1 + 1 = 2, two, and two green treetop-dots.

The next spread: 2 + 2 = 4, four, and now the dots are smaller, four red apples.

Each time you turn the page, the number of dots you can see doubles and the dots get smaller. And the artist makes pictures out of them. The picture on the front cover with dots as freckles is the picture for 256.

When it gets to 524, 288, it takes a long fold-out page to show all the dots, even though they’re very small, and they’re even smaller on the other side with 1,048,576 dots.

I love the idea of this, because I’m a firm believer that people simply don’t understand how big a million is. In fact, I’ve got a little problem with using the 256 picture on the cover, because children might think that’s a million dots. And once it does show a million, the dots are so small my old eyes aren’t even sure which parts of the picture are dots and which aren’t. You couldn’t really explain it from the front of a room in storytime.

So for storytimes, I still prefer How Many Jelly Beans?, by Andrea Menotti, which also has a fun story to go along with the big numbers. But for kids to explore and wonder over the numbers by themselves or in small groups? This book is marvelous.

And this is a good time to try to understand that when you’re talking exponential growth, numbers get big very, very quickly.

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Source: This review is based on a library book from Fairfax County Public Library.

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Review of Beto’s Berry Treasure, by Jenny Lacika, illustrated by Addy Rivera Sonda

Beto’s Berry Treasure

by Jenny Lacika
illustrated by Addy Rivera Sonda

Storytelling Math (Charlesbridge), October 8, 2024. 32 pages.
Review written July 19, 2024, from my own copy given to me at ALA Annual Conference.
Starred Review

It’s no secret that I’m a huge fan of Charlesbridge’s Storytelling Math series. In fact, I went up to their booth and gushed about them on the last day of this year’s ALA Annual Conference – and they gave me one of their copies of this newest entry in the series!

All the books have a cultural element, in this case two Mexican American kids who speak some Spanish. They also present in very simple terms an early math concept, with tips for parents to extend the ideas at the back. And it’s always found in a picture book story that will engage kids even if it weren’t teaching math concepts.

Beto’s Berry Treasure is about spatial relationships and making and following maps.

Beto wants his big sister Cora to play tea party with him, but she only wants to play pirate. So Beto decides to make a pirate map of hidden treasure – the treasure being berries for the tea party.

But Beto’s first tries don’t lead Cora to the treasure! How can he fix it?

And will there be any berries left by the time Cora finds the treasure?

This simple story is a fantastic conversation – and play – starter. And believe it or not, spatial relationships and being able to give step-by-step instructions (or a map) are early math concepts.

Another brilliant entry in the series.

jennylacika.com
astound.us/addy-rivera-sonda
charlesbridge.com/storytellingmath

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Review of Look for the Math Around You, by Alice Aspinall

Look for the Math Around You

Arrays
Estimation
Fractions
Geometry
Math Chats
Patterns

by Alice Aspinall

Code Breaker, 2020. Each volume 56 pages.
Review written December 13, 2022, from library books.
Starred Review

I’m reviewing a series of six books with this post. I’m super proud that I found these for the library and just got a chance to read them myself. They’re even better than I’d hoped!

What these books present is a wonderful opportunity for mathematical conversations for adults to have with kids as young as Kindergarten through 4th or 5th grades. They’ve got questions that made me think, and they model mathematical thinking.

Every book begins with a page that says this:

This book features photos taken from everyday, real-life moments. Use the photos as prompts to start a math conversation with children. Each photo is accompanied by optional question prompts. In some cases, there are many correct answers. The thinking process and mathematical discussion are more important than the correct answers. Have fun!

I read that in the first book, and right away my heart responded with a “Yes! Yes! Yes!”

I’ll include some example questions from the different books:

From Arrays, next to a photo of a garage door:

How many rectangles are in this photo? Look closely.
Explain how you counted them.

From Estimation, next to a photo of popcorn in a bowl:

There are two kinds of popcorn in the bowl. How would you describe how much of each kind is in the bowl? Think about using:
–Numbers
–Fractions
–Percentages
–Words

From Fractions, next to a photo of an uncut pan of brownies:

The brownie needs to be shared with 8 people.
Show the different ways you can cut the brownie so that all 8 people get the same amount of brownie to eat.

From Geometry, next to a photo of an orange slice, first in a circle and then pulled into a line:

The orange slice shows the parts of a circle. The circumference is the peel, wrapping all the way around the outside of the circle. The area is the flesh of the orange. Point to each part of the circle.

When we pull apart the orange slice, we can see the parts of the circle in a different way. How many segments can you count?

What do you think is the length of the circumference of this orange slice? How do you know?

From Math Chats, next to a photo of a fire pit with marshmallows toasting:

How far away should the marshmallow be from the fire for the best roast?
In what direction do you rotate your skewer to toast the marshmallow?
How much of the marshmallow do you like covered in char?
What ratio of cracker to chocolate to marshmallow makes the best s’more?
How many pieces of chocolate do you like in a s’more?
What pattern do you use to assemble a s’more?

From Patterns, next to a photo of a pie with a lattice top:

How is the pie crust arranged? Use words to explain how all the pieces are weaved together.
What other patterns can you find on the pie? Look for shapes.

That should give you the idea. The books are loaded with interesting photographs accompanied by open-ended questions that encourage mathematical thinking. And because the questions are open-ended, your child may surprise you!

You can find all these books in the Fairfax County Public Library catalog if you search for “Look for the Math Around You.”

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Arrays
Estimation
Fractions
Geometry
Math Chats
Patterns

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Review of Folding Tech, by Karen Latchana Kenney

Folding Tech

Using Origami and Nature to Revolutionize Technology

by Karen Latchana Kenney

Twenty-First Century Books (Lerner), 2021. 104 pages.
Review written September 20, 2022, from a library book
2023 Mathical Book Prize Honor Book, Ages 11 to 18
Starred Review

Here’s a fascinating look at something I didn’t even realize was mathematical — origami. And the book explains how engineers and mathematicians studying origami have created some amazing and helpful technology.

The beginning talks about how there’s not much room in a spacecraft, but a large area is what’s needed for solar panels to power them. So in 1985, Koryo Miura proposed using an ancient folding pattern he’d studied to fit a solar array into a spacecraft. Japan launched such a craft in 1995.

Then the book talks about the long history of origami, particularly in Japan. But it’s been revived in modern times, and studying it mathematically has helped create intricate and beautiful patterns. And then when stiff materials are used instead of paper, engineers can create foldable structures easy to assemble and inexpensive to create.

Engineers also find folding in nature. I was fascinated by the way they studied how ladybugs fold their wings under their elytra (the red and black shell on top). In order to get a good look, they 3D printed a clear plastic elytra and replaced the ladybug’s own. Then they could see how the wings fold and unfold so quickly and neatly.

And there are so many uses for this technology! Besides outer space, there are even uses for tiny folds, including a foldable heart stent to go inside human arteries. There are also many uses in architecture and robots, and, really, the human imagination is the limit.

This book includes some origami designs the reader can try out. My one quibble is that I would have liked many more pictures. Some structures created using principles of origami were described in detail, and a picture would have helped visualize it. I read about a crushable beverage can with a diamond-shaped folding pattern and the Al Bahr Towers in Abu Dhabi that have a folding facade that changes shape in response to the sun. I would have liked to see pictures. Also, the James Webb telescope that made news recently as it began sending back photos of space did get a picture, but the only discussion of the folding that made that telescope possible was in the picture caption.

However, besides my little quibble (I just wanted more), this book is packed with fascinating information. My eyes are opened now, and I know I’m going to notice more folds, both in nature and in technology. A section at the end tells kids how they can pursue the path toward becoming an origami professional.

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lernerbooks.com

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Review of Bracelets for Bina’s Brothers, by Rajani LaRocca, illustrated by Chaaya Prabhat

Bracelets for Bina’s Brothers

by Rajani LaRocca
illustrated by Chaaya Prabhat

Storytelling Math, Charlesbridge, 2021. 32 pages.
Review written December 28, 2021, from a library book
Starred Review

This is another book from Charlesbridge’s outstanding Storytelling Math series. The books fit math content naturally into a story about kids’ lives. Most of them also have a cultural element which is presented seamlessly.

In Bracelets for Bina’s Brothers, Bina wants to make rakhi bracelets for her three brothers as the traditional gift on Raksha Bandhan, an Indian holiday. Even though her brothers can be annoying and like to tease, she finds out each one’s favorite color and least favorite color.

Bina and her mother get beads at the store, and Bina and her dog make bracelets using an every-other-one pattern. The use different colors for each brother and the third brother gets two beads for each stripe.

It’s a simple story, but it’s an interesting story with fun characters, and it’s a perfect vehicle for talking about alternating patterns with young kids — and maybe progressing to other patterns.

Like the other books in the series, this one has a cultural note at the back and further ideas for exploring the math in the book. This book makes a great jumping-off point.

rajanilarocca.com
chaayaprabhat.com
terc.edu
charlesbridge.com

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Review of A Quantum Life, by Hakeem Oluseyi and Joshua Horwitz

A Quantum Life

(Adapted for Young Adults)

My Unlikely Journey from the Streets to the Stars

by Hakeem Oluseyi and Joshua Horwitz

Delacorte Press, 2023. 333 pages.
Review written January 14, 2024, from a library book
Starred Review
2024 Mathical Book Prize Winner, 9th-12th grades

I usually read nonfiction fairly slowly, a chapter at a time, interspersing with novels. I managed to start this book that way, but it didn’t last long. I took one break from it, but when I picked it up again, I couldn’t stop. The novels could wait.

This book tells the story of Hakeem Oluseyi, who began his life as James Plummer Jr., and who progressed to be a renowned astrophysicist. His road to get there was not easy. There were times reading this book when I was almost afraid to turn the page, and I’d have to remind myself that the book flap said he indeed became an astrophysicist.

Here’s how he describes his childhood in the Prologue:

As a bookish kid, I was an easy target in Watts, Houston’s Third Ward, and the Ninth Ward of New Orleans. My gangbanger older cousins taught me the rules of the street by the time I was six: who you could look at in the eyes and who you couldn’t, how to tell if the dude walking toward you was Crip or Blood, friend or foe. I developed a sixth sense, what I thought of as my “dark vision,” that let me see all the dirt in my hood: where a deal was going down and where the undercover heat was hiding. The scariest time was after sunset, when the predators came out in force.

I was intrigued by the wider universe, including the night sky. But I couldn’t see many stars from the streets where I grew up, what with the big-city lights and the smog. And for the sake of my own survival, I didn’t want to be caught staring off into space. Celestial navigation wasn’t going to help me find my way home without getting beat up or shaken down. By my early teens, I’d adopted a thug persona, walking and talking tough, carrying a gun for protection. But I never joined a gang, and no matter how hard I’d tried to straddle the gangsta-nerd divide, I was still mostly a science geek playacting a thug.

This was a Black kid with a very unstable housing situation growing up — changing schools frequently and not having reliable adults in his life. Yet this same kid taught himself quantum mechanics by reading the encyclopedia and had a prodigious memory and strong curiosity.

And here’s a spoiler that’s not really a spoiler: This kid from a drug-using family was the first in his family to graduate from high school and went on to get a PhD in Physics.

He had help along the way and got into some tight spots, but he did it. And that story is both riveting and inspiring.

I was happy to be part of the committee that gave the 2024 Mathical Book Prize for books for high school to this outstanding book.

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Review of How to Explain Coding to a Grown-Up, by Ruth Spiro, illustrated by Teresa Martinez

How to Explain Coding to a Grown-Up

by Ruth Spiro
illustrated by Teresa Martinez

Charlesbridge, 2023. 32 pages.
Review written November 17, 2023, from a library book.
Starred Review

I love this title! It of course gives a clear and simple explanation of coding — because that’s what grown-ups need.

The pictures show an elementary school-aged kid and her grown-up. And the book explains that sometimes your grown-up may need your help understanding things. I love the Pro Tips sprinkled throughout. Here are some examples:

Pro Tip: When dealing with grown-ups, don’t jump into the complicated stuff too fast. Start with something they already know.

At that point, you’re explaining that many common objects in your home have computers inside them.

Pro Tip: Now may be a good time to check in with your grown-up. Ask if they have any questions before you move on.

That tip comes after showing what’s inside a computer, talking about what code is, and telling that programmers write the code.

Then to explain algorithms, you’re encouraged to take your grown-up for a walk in the park with healthy snacks, using an algorithm to decide whether to swing on the swings (depending on if one is available). With that example, the grown-up learns about conditionals and loops.

Then the book adds some more details such as debugging, and then it’s time to ask your grown-up questions.

Pro Tip: If your grown-up can explain it, that shows they understand it!

It all adds up to a basic explanation of coding that’s a lot of fun to read.

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charlesbridge.com

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Review of Kitty & Cat: Bent Out of Shape, by Mirka Hokkanen

Kitty & Cat

Bent Out of Shape

by Mirka Hokkanen

Candlewick Press, 2023. 36 pages.
Review written December 6, 2023, from a library book.
Starred Review

Okay, there’s a place for simple books about shapes. They teach little ones something they need to know. Good.

And then we have books about shapes on an entirely different level — books that parent and child will thoroughly enjoy and laugh over — while learning about shapes at the same time.

This book would become a go-to pick for me for Toddler Storytime if I still worked in a library branch. The idea is simple: A cat hiding because he doesn’t want to take a bath.

On the first page we see Cat curled up in a Circle-shaped basket with a speech bubble coming from off the page: “Cat! Time for a bath!”

The next page shows the basket empty, and a small child’s feet nearby, with the speech bubble, “Cat?”

From there on out, we’ve got a repeating pattern: A spread in some room of the house with Kitty and Puppy cavorting about, along with the speech bubble pointing off-page: “Where’s Cat?”

The next spread says “There’s Cat!”

The “There’s Cat!” reveal is where the hilarity comes in. On the frontpapers at the start of the book, we’d seen nine simple shapes named. It turns out, Cat is very good at putting his whole body into these shapes. On each reveal spread, we see that Kitty or Puppy has knocked down an object with a simple shape — and now we see Cat, who’d been hiding behind it, exactly matching the shape.

First, he hides behind a rectangular cereal box in the kitchen, and then my favorite (because it’s just silly) — a triangular vase in the dining room.

And so it goes. The words are as simple as “Where’s Cat? There’s Cat!” but the pictures show Cat frantically trying to stay concealed while Kitty and Puppy romp about the whole house, making mayhem.

Cat’s expression after his bath is priceles, too. And the final shape is a heart with all three animals — but a new threat for Kitty and Puppy.

There’s another page of those same nine shapes at the back of the book — but this time all of the shapes have a picture of Cat inside of them.

Just absolutely silly fun — and Shapes!

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Two New Prime Factorization Blankets

I got two new great-nephews in 2022!

They are both second sons of their families. I didn’t knit their older brothers’ new blankets because I had barely finished my nephew Martin’s blanket, and they came so close together, I settled for two little cardigans.

But for Kellen and Tobi, I decided it didn’t matter if I was late finishing (and I was) — they needed Prime Factorization Blankets!

The idea is the same as my first Prime Factorization Blanket for Arianna:

Rows of Entrelac squares (or diamonds), going from 1 to 99. 1 is white and I put rows of white squares in between the rows with other numbers. After 1, every prime number gets its own color. For composite numbers, I put sections of the colors for each factor. So 4 gets two sections of 2, 6 gets a section of 2 and a section of 3, and so on, all the way up to 99, which gets two sections of the color for 3 and one section of the color for 11.

Kellen is modeling his blanket in the picture above, and here are some more pictures of it.

First the blanket as a whole. I knew he was a boy, so I used lots of blues, with 2 being yellow.

The corner at the start with the missing square for zero:

And the right bottom corner with some numbers labeled:

I don’t think I knew Tobi’s gender when I started his blanket, and I decided to try for bright colors instead of pastels, so 2 was red. Here’s the whole blanket:

Detail for the lowest numbers:

Detail for the highest numbers:

And some primes at the top of the blanket:

So much fun! (Tobi’s parents, if you read this, I need more pictures of Tobi modeling his blanket!)

And yes, I’m happy to report that my youngest sister is now expecting a baby, and he’s going to get a prime factorization blanket, too! I learned tonight that he’s a boy, so 23 is going to be blue.

Babies and math are beautiful!