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.
We measure time in minutes, hours, days, weeks, months, seasons, years, and in historical dates. We talk about mealtimes, bedtimes, school times, holiday times, and good times. We also use words such as past, present, future, next, last, before, and after. This engaging book looks at human time as well as how time passes in nature. Time is about change. How do animals and plants sense changes in time? What changes do we see in nature throughout a day, month, and year?
The business of borrowing is the cornerstone of an economy. How do Mortgages, Loans, and Credit Work? explains clearly the different kinds of financial borrowing and their uses.
This interesting new book provides essential information with plenty of full-color images to help explain the basics of importing and exporting in a global economy. Aspects such as importing and exporting regulations are carefully and easily explained in this latest Crabtree title.
Children are consumers, too, though they often do not realize it. This strikingly illustrated book helps youngsters understand the concepts of goods and services so that they recognize their role in the cycle of commerce. Readers will examine various jobs to understand where goods are made or services are provided. The concepts of producers and consumers are also carefully explained in a manner children will understand and enjoy.
This is a volume designed to inform children what taxes are and why they are needed. Emphasis is placed on how taxes provide the funds needed to keep governments running, from local to federal levels. Young readers will understand how taxes are used to dissuade people from buying some items, such as cigarettes and gas-guzzling vehicles. Attractive color images help de-mystify this fascinating and important aspect of government.
This book describes resources to younger readers, including capital resources and natural resources. Emphasis is placed on how most resources are of limited supply, so producers and consumers must make choices when things they want or need become scarce. An impressive array of full-color images enhances the reading experience.
This book carefully explains how countries around the world engage in trade. Whether it is a detailed description of how countries negotiate trade agreements, how countries use tariffs to make buyers want to buy locally produced goods, or the extremes of using trade embargoes as political tools, this book provides essential information with plenty of full-color images to help explain the basics of trade in a global economy.
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.
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.
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!
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.
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!
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?
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!
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.
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.
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.
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.
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.
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.
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.
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 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.
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.