## Dinosaur Numbers

###### David West (author)

Publisher: Crabtree Publishing Company ISBN: 9781427193223

Four hungry Torosauruses are chasing three fast Mynonykuses. One of them is not going to get lunch! Kids will love counting dinosaurs in this exciting book about numbers.

## Comparing Fractions

###### Minta Berry (author)

Publisher: Crabtree Publishing Company ISBN: 9781427196460

This engaging title builds on the material covered in the Fractions title in this series. Readers will develop an understanding of fractions as numbers. Easy-to-follow text and supportive images help readers recognize and generate equivalent fractions. Readers will also learn how to compare two fractions with the same numerator or the same denominator and represent fractions on a number line.

## Time Word Problems

###### Lisa Colozza Cocca (author)

Publisher: Crabtree Publishing Company ISBN: 9781427191977

Engaging narrative, vivid photographs, and real-world examples combine to teach readers how to solve time word problems. Readers will learn how to measure time intervals in minutes and represent authentic time problems on a number line diagram.

## Building Sets of Ten

###### Minta Berry (author)

Publisher: Crabtree Publishing Company ISBN: 9781427196484

Understanding how to make ten is a key building block in the base-ten system. In this engaging title, young readers explore different number combinations that make up the number ten. Easy-to-follow text and colorful images introduce readers to the concept of a fact family and related facts. The text also models how readers can use their fact family knowledge to solve missing addend questions that equal ten.

## Calendar Math

###### Lisa Colozza Cocca (author)

Publisher: Crabtree Publishing Company ISBN: 9781427191960

Calendar Math provides an ideal introduction to measuring time. From the days of the week to months of the year, readers will learn the different ways a calendar measures time. Vivid, full-color images and entertaining narrative text model concepts such as patterning, comparing and contrasting, and solving simple problems.

## Patterning

###### Minta Berry (author)

Publisher: Crabtree Publishing Company ISBN: 9781427196491

This entertaining title introduces young readers to the concept of patterning. Readers will learn that a pattern is an ordered set of numbers or shapes arranged according to a rule. Accessible text and vivid images guide readers as they learn to identify patterning rules and extend patterns. Readers are also encouraged to create their own patterns and recognize patterns in the world around them.

## What is symmetry in nature?

###### Bobbie Kalman (author)

Publisher: Crabtree Publishing Company ISBN: 9781427194978

Mathematicians say that symmetry has to be identical parts, but nature is never truly identical. However it is far more interesting than geometric shapes! Reading this book, children will become aware of the balance of things in nature. They will delight at amazing photographs of butterflies, beetles, leaves and flowers, fruit, sea creatures, and children. This book will show how a person with arms outstretched has five-fold symmetry like a sea star, and if you drew a circle around his or her body in that position, the navel would be at its center.

## I can count / Sé contar

###### Bobbie Kalman (author)

Publisher: Crabtree Publishing Company ISBN: 9781427195883

One dog in a teacup, two caterpillars on a leaf, three horses having a conversation Fun photographs and simple text help introduce young readers to counting numbers from zero to ten. A fish-counting activity encourages young readers to practice their counting skills.

## Polygons

###### Marina Cohen (author)

Publisher: Crabtree Publishing Company ISBN: 9781427195036

Polygons are shapes with a number of sides joined together. They are everywhere! A baseball field is a diamond-shaped polygon. Join Emily at a baseball game and look for different shapes. She discovers that the field is full of much more than baseball players - it's filled with polygons, too.

## Regrouping

###### Claire Piddock (author)

Publisher: Crabtree Publishing Company ISBN: 9781427195043

Betsy helps out at Aunt Essie's Downtown Diner. Supplies, such as straws, are packed in groups of ten. Betsy breaks up tens and make tens as she helps set up and clean up. Read about the restaurant where Betsy learns about regrouping. See how regrouping helps in addition and subtraction.

## Rounding

###### Dorianne Nardi, Marsha Arvoy (author)

Publisher: Crabtree Publishing Company ISBN: 9781427195050

When a quick guess is needed to count something, rounding can make math faster and fun! Read about two friends who are helping at a school fair. They learn that measuring, adding, and subtracting is easier if the numbers are rounded to whole numbers first. The children figure out ways to use rounding to estimate the amount of money raised at the fair, too!

## I can count

###### Bobbie Kalman (author)

Publisher: Crabtree Publishing Company ISBN: 9780778791829

One dog in a teacup; two caterpillars on a leaf; three horses having a conversation. Fun photographs and simple text help introduce young readers to counting numbers from zero to ten. A fish-counting activity encourages young readers to practice their counting skills.

## Area

###### Dorianne Nardi, Marsha Arvoy (author)

Publisher: Crabtree Publishing Company ISBN: 9781427194992

What is area? It is a measure of space or of a place! The kids in Mrs. Jacksons class are learning all about area, and you can, too. See why area is important, what it is used for, and how to measure area in meaningful ways. Soon you will be measuring area in your own everyday experiences.

## Decimals

###### Claire Piddock (author)

Publisher: Crabtree Publishing Company ISBN: 9781427195005

A pet store is not only a good place to learn about animals, its also a fun place to learn about math! Follow Luis on his pet store adventure and learn about decimals. The animals get involved, toothed goldfish even act out math problems!

## Money Problems

###### Marina Cohen (author)

Publisher: Crabtree Publishing Company ISBN: 9781427195012

Find out how to add and subtract cents when buying or selling something. Brian wants to make a lemonade stand to raise money for the local food bank. How much should he charge for a glass? How much change will customers receive? How much money will Brian raise?

## Place Value: The Next Stage

###### Claire Piddock (author)

Publisher: Crabtree Publishing Company ISBN: 9781427195029

Have you ever built something really big with building blocks? Did you need to use hundreds of blocks? Read about an after-school center, where the toys are counted in ones, tens, and hundreds, and it's easy to see place value in the numbers. Learning about place value is all fun and games at this play center!

## Position and Direction

###### Claire Piddock (author)

Publisher: Crabtree Publishing Company ISBN: 9780778791591

Kids will learn about position and direction by following along with Sam in his family's new home. Where will he put things in his room - top, bottom, inside, outside, behind, in front, above, or below? Other concepts include left and right, and north, south, east, and west.

## Probability

###### Marina Cohen (author)

Publisher: Crabtree Publishing Company ISBN: 9780778791607

Ella is trying to decide who to invite over to play. This fun book helps teach children how likely it is that a certain result will happen. Simple activities performed by Ella include flipping a coin, rolling a number cube, and playing a game with a spinning wheel.

## Roman Numerals and Ordinals

###### Kylie Burns (author)

Publisher: Crabtree Publishing Company ISBN: 9780778791614

All of the clocks at the amusement park have roman numerals instead of numbers. Young readers will learn how Abby and Ben figure out how to read roman numerals as well as the order of the rides they want to go onfirst, second, and third.

## Slides, Flips, and Turns

###### Claire Piddock (author)

Publisher: Crabtree Publishing Company ISBN: 9780778791621

Sofia makes a special birthday card for her Grandma by sliding, flipping, and turning shapes. Using the same simple steps, young children will learn about transformations as well as concepts such as diagonal, horizontal, and vertical.

## Using a Calculator

###### Dorianne Nardi Marsha Arvoy (author)

Publisher: Crabtree Publishing Company ISBN: 9780778791638

Ann's grandfather is teaching her how to use a calculator. This simple, engaging book describes the parts of the calculator, what the math symbols on the buttons mean, and how to do simple equations. Concepts explained include addition, subtraction, division, mulitplication and patterns.

## Symmetry

###### Lynn Peppas (author)

Publisher: Crabtree Publishing Company ISBN: 9780778797692

Simple text and colorful photos make learning important concepts easy. Familiar two- and three-dimensional geometric shapes and their properties from home and school are used to introduce children to symmetry and asymmetry, lines of symmetry, and congruence.

## The Metric System

###### Paul Challen (author)

Publisher: Crabtree Publishing Company ISBN: 9780778797708

This fascinating book takes young readers on a trip to a science lab where they will learn about the metric system. Simple text shows ways of measuring length (meters and centimeters), temperature (Celsius), and weight (grams and kilograms). Comparisons between key metric measurements and similar U.S. customary measurements, such as yards, inches, and Fahrenheit, help children understand the two systems.

## Lines, Segments, Rays, and Angles

###### Claire Piddock (author)

Publisher: Crabtree Publishing Company ISBN: 9780778791577

Grace and Ethan are going to the fair with their Aunt Sarah. Lines and angles are everywhere they look. Young readers will love to follow along with them and learn what lines and angles are.

## Division

###### Ann Becker (author)

Publisher: Crabtree Publishing Company ISBN: 9780778797647

The world of division is explored in the setting of a hardware store. Through modeling, readers will explore the meaning of division, the connection between division and subtraction, and the relationship between division and multiplication. Appealing photographs and helpful diagrams provide readers with a clear understanding of division.