Taxes are collected to support federal, state, and local governments. Who decides how much tax each citizen pays? What does tax money pay for? Read this book to find the answers to these questions and to learn more about taxes and why citizens are required to pay them.

People use money to pay for the things they want and need. But what exactly is money? Where does it come from? Are checks and credit cards money? Read this book to find the answers to these questions and learn more about money.

Do you have a great idea? Do you think customers would pay to buy your product or service? Read this book to learn more about starting your own business and why good math skills are necessary if you want to make your business a success.

Do you have time, talent, or money that you can use to help others in need? Have you ever wondered which charities you should support or how much you can afford to give? Read this book to find out more about how your math skills can help you give back to your community.

This book uses math and science to help students learn about Islands. Math challenge questions provide students with the opportunity to apply math skills as they learn about the characteristics of islands.

This book uses math and science to help students learn about mountains. Math challenge questions provide students with the opportunity to apply math skills as they learn about the characteristics of mountains.

Take an in-depth look at mathematics in this science encyclopedia.

Take an in-depth look at physics in this science encyclopedia.

This book explains how models help us test new designs and to understand living things. The book includes various types of models, such as scale, graphical, conceptual, and computer models, which are used to analyze how we understand different things.

Take an in-depth look at mathematics in science in this science encyclopedia.

Almost any game you play needs math. From poker to computer games, from video games to board games, math has a role to play. Game Math will help you understand your favorite games better. You may even find you're a better player when you understand the math behind the rules!

We live our lives according to the numbers on a clock. Whether its getting to school on time, allowing enough time in a day for the things we need to do, or timing an activity, those numbers are an important part of almost everything we do. Time Math will help you understand schedules and timetables. You'll be able to better manage the math that runs our clocks!

People who make clothes need to get their numbers right. From the length of fabric to the size of a pair of jeans, math plays an important role in the fashion industry. In Fashion Math, you'll learn some of the ways the math you learn in the classroom is important on the catwalk. You may even want to use that math to try your hand at making your own clothes!

When you see a sign in your favorite store saying that everything is 30% off, can you do the math to figure out what that means? Are you good at keeping track of how much things cost while remembering how much money you actually have in your wallet? What about sales tax? Do you remember to add that on to your total costs when you're deciding if you have enough money to buy a pair of jeans? Shopping Math can help you do all this and more!

The speed of a pitch, the number of points scored, the time left on the clock . . . math is everywhere in the world of sports. Learn about the numbers and statistics behind sports like baseball, basketball, and football, and you'll find you understand the sports you love even better. In Sports Math, you'll discover that the math you learn in the classroom is just as important on the soccer field and basketball court.

Have you ever thought about starting a business? Even if you just babysit . . . or mow lawns . . . or sell homemade jewelry at craft fairs, youll need to know some basic math to help you keep track of your expenses and earnings. Businesses need math. Learn what youll need to know to make money. Who knows where it might lead you!

From download speeds to the amount of memory left on your hard drive, math is a big part of using computers. Understanding the math that is so important to computers can help you in the classroom and in future jobs. When you're playing computer games, understanding math can even help you have more fun. In Computer Math, you'll learn about how math powers the computers you use every day.

Cooking is a kind of science - you have to get the measurements right to make everything work. It takes math. In Culinary Math, you'll discover how numbers, ratios, and other math help make tasty foods you can cook yourself.

If youve ever gotten a check for your birthday or saved money for something you wanted to buy, youve seen that even a little money can mean a lot of math. Understanding the math behind money and banking can help you save and spend wisely, even if you dont have much. In Banking Math, youll learn about the numbers and arithmetic that are part of everyday life. Whether youre buying something at the store or saving for a vacation, math is a huge part of everyday life.

Take an in depth look at mathematics in this science encyclopedia.