Provides engaging information about basic math concepts through the format of riddle clues and answers. Vibrant photos help illustrate the subject. Additional features include a phonetic glossary, and introduction to the author, and sources for further research.
Introduces readers to the concept of opposites through simple text, photographs, and matching activities. Additional features to aid comprehension include a phonetic glossary, an index, an answer key, sources for further research, and an introduction to the author.
Informs readers about how to identify certain coins and bills, as well as their value, through simple text, photographs, and matching activities. Additional features to aid comprehension include a phonetic glossary, an index, an answer key, sources for further research, and an introduction to the author.
Informs readers about even and odd numbers, Roman numerals, and other numerical concepts through simple text, photographs, and matching activities. Additional features to aid comprehension include a phonetic glossary, an index, an answer key, sources for further research, and an introduction to the author.
Introduces readers to the fundamental concepts of a twenty-dollar bill, highlights various security features, and explores its history. Additional features to aid comprehension include labeled diagrams, critical-thinking questions, fun facts, a map of where money is made, and a profile of Andrew Jackson, whose face marks the front of the twenty-dollar bill.
In this book, readers learn what gravity is and how it impacts weight. They learn about the US customary system and the metric system, where each is used, and the units of measurement in each system. Readers also learn about balances, scales, and estimating weights.
In this book, readers learn what volume is and why and how it is measured. They learn about the US customary system and the metric system, where each is used, and the units of measurement in each system. Readers also learn about volumes of liquids and solids.
In this book, readers learn what temperature is and why and how it is measured. They learn about the Celsius and Fahrenheit scales and where each is used. Readers learn about thermometers and how they help us in everyday life--from taking body temperatures to regulating how cool or warm our homes are.
In this book, readers learn what length is and why and how it is measured. They learn about the US customary system and the metric system, where each is used, and the units of measurement in each system. Readers also learn how to estimate distances and lengths.
In this book, readers learn what the clock measures and why knowing how to tell time--in seconds, minutes, and hours--is important. They learn the history of the clocks, including sundials and hourglasses. They also learn how to read analog and digital clocks to tell time. Sidebars instruct math by showing readers how to add and subtract hours.
In this book, readers learn what the calendar measures and why knowing how to measure days, weeks, months, and years is important. They learn the history of the lunar and solar calendars, how days and months get their names, and the different calendars around the world. Sidebars instruct math by showing readers how to add and subtract days.
Readers learn how this simple machine makes it easier to lift, lower, and open things. They learn the three types of levers: first-class, second-class, and third-class. By the end of the book, readers know the difference between complex and simple machines and how levers are used in everyday life to make work easier.
Readers learn how this simple machine makes it easier to move things to different levels. They learn how flatter slopes use less effort than steeper slopes. By the end of the book, readers know the difference between complex and simple machines and how inclined planes are used in everyday life to make lifting and lowering objects easier.
