## 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.

## 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.

## 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.

## Math Words and Symbols

###### Lynn Peppas (author)

Publisher: Crabtree Publishing Company ISBN: 9780778797654

Through real-life situations, children will be introduced to the vocabulary of math words and symbols. Fundamental vocabulary such as "greater than" and "less than," and the meaning of symbols such as +, /, =, are all explained with engaging photographs and easy-to-understand text.

## Multiplication

###### Ann Becker (author)

Publisher: Crabtree Publishing Company ISBN: 9780778797661

Through vivid photographs, simple illustrations, and clear text, young readers will discover the basics of multiplication. In the setting of a bakery, readers will explore the relationship between multiplication and addition, the properties of multiplication, and models of multiplication.

## 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.

## Sorting

###### Lynn Peppas (author)

Publisher: Crabtree Publishing Company ISBN: 9780778797678

In this book, young readers will grasp how to count, sort, classify, and organize various sets of items through engaging, everyday activities that kids can relate to. Through simple text and colorful photographs children are introduced to systems for sorting sets of shapes, colors, sizes.

## Subtraction

###### Ann Becker (author)

Publisher: Crabtree Publishing Company ISBN: 9780778797685

This exciting new book helps budding mathematicians discover how to use subtraction. Come along with a museum curator as he prepares a butterfly exhibit. Concepts of taking away, comparing, difference, key words, modeling, and using the algorithms of subtraction are all explained in a fun and real-life setting.

## Place Value

###### Penny Dowdy (author)

Publisher: Crabtree Publishing Company ISBN: 9780778790235

Understanding the place value system is a foundation to all operations as children progress in mathematics education. This book introduces readers to the whole number place values, comparing, and ordering numbers using colorful, engaging images and simple text.

## Measurement

###### Penny Dowdy (author)

Publisher: Crabtree Publishing Company ISBN: 9780778790211

Colorful photographs of measuring tools show the reader how they can measure using common tools at home. This book offers the young reader a clear insight into understanding length, weight, capacity, and temperature.

## Money

###### Penny Dowdy (author)

Publisher: Crabtree Publishing Company ISBN: 9780778790228

This book is filled with full color artworks and images, introducing the young reader to the concepts of currency. Money explains the many concepts of money to primary readers, including understanding the value of unique coins and bills, counting money, and checks.

## Graphing

###### Penny Dowdy (author)

Publisher: Crabtree Publishing Company ISBN: 9780778790198

This book introduces the concepts of surveys, data, pictographs, and bar graphs with excellent visuals and engaging text. In this book, young readers will understand how numerical data is communicated through graphs.

## Fractions

###### Penny Dowdy (author)

Publisher: Crabtree Publishing Company ISBN: 9780778790181

This book introduces readers to the more formal terms and concepts of fractions while still using ideas that they relate to. Concepts include parts of a group and parts of a whole. Exciting writing and colorful images make this book an enjoyable read.

## Estimation

###### Penny Dowdy (author)

Publisher: Crabtree Publishing Company ISBN: 9780778790174

This book teaches children how to estimate and use estimates in everyday situations. The concepts are illustrated through exciting visuals and simple text.

## Where is it?

###### Bobbie Kalman (author)

Publisher: Crabtree Publishing Company ISBN: 9780778789420

This simple book uses wonderfully appealing images in nature to teach children about left and right, on and under, far, near, and beside, inside and outside, and more.

## What time is it?

###### Bobbie Kalman (author)

Publisher: Crabtree Publishing Company ISBN: 9780778790389

This engaging book looks at human time as well as how time passes in nature. How do animals and plants sense changes in time? What changes do we see in nature throughout a day, month, and year?