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This engaging title helps young scientists identify, compare, and contrast natural and human-made materials. Child-centered text and vibrant images combine to clearly explain the properties and uses of these materials.

This engaging title introduces readers to materials that are either hard or soft. Using familiar examples, readers learn what makes hard and soft objects different and why they are suited for different purposes. Easy-to-understand text and colorful photos invite young readers to identify and classify hard and soft things around them.

Historically, farming was a very taxing, physical task. Bright-minded individuals revolutionized agriculture with inventions that eased tasks and sped up production. The advent of milestone machines such as Eli Whitney's cotton gin are chronologically explored in this stimulating title.

This fascinating book brings to light the profound changes that took place during the American Revolution. It was often hard to distinguish homefront from battle front as most of the 13 colonies experienced battle during the American Revolution. Neighbors were sometimes on different sides of the war, some still being loyal to England. The economy suffered as inflation ran out of control. Readers will discover that it was also a time of great social change and more freedom, particularly for women and for some African American slaves. Women assumed a lot of the household affairs and had more decision-making power as men went off to war. Slaves sought their freedom by joining the British.

Word Problems: Mass and Volume uses an engaging narrative and authentic, real-world problems to teach readers strategies to solve one-step word problems involving mass and volume. The text models the problem-solving process for readers and provides hands-on opportunities for readers to apply their own problem-solving skills. Readers will discover that there is often more than one way to solve a problem.

This book offers readers insight into solving length word problems. Designed to support the Common Core State Standards, this title includes strategies such as using drawings, symbols, and number lines to solve problems. Real-world examples and engaging text make learning meaningful to young readers.