"David A. Adler and Edward Miller tackle questions about different kinds of triangles with a crystal-clear text and cheerful illustrations starring two friendly kids and one savvy robot."--www.Amazon.com.

Introduces the basics of magnetism, covering such concepts as attraction, poles, electromagnetism, and force.

This introduction to levers, wheels, pulleys, inclined planes, and more explains how simple machines simplify our lives.

Fractions, decimals, and percents are everywhere! Just take a stroll around a county fair. There are fractions at the pie-eating contest, decimals in the arcade, and percent signs in the prize booth. Each time you see a fraction, decimal, or percent, you can easily convert it into its equivalent. This entertaining picture book is sure to earn 100% from math students and teachers.

Introduces children to American currency values and the basics of adding and subtracting money.--

Introduces the physical properties of objects that sink or float and offers examples of them in everyday life, along with simple experiments to try at home.

Introduces the seven symbols and their values, shows how to add and subtract to make numbers. Teaches how the symbols interact and about the bar across the top and the open box that are used for larger numbers. Shows Roman numerals in real life settings: on clocks, in books, and on buildings.

Huge numbers are hard to comprehend. This book explains quantities in terms children can understand. For example, one million dollars could buy two full pizzas a day for more than sixty-eight years.

"John Adams was an American patriot and Founding Father, and Abigail, his wife, was his most trusted adviser for more than fifty years. While John served in both Continental Congresses, Abigail managed their farm within earshot of cannon fire. She later advised her husband through amusing letters as he served as our first ambassador to Great Britain. And when John was elected America's first vice president and our second president, Abigail vowed to...

Features the lives and accomplishments of James and Dolley Madison, including their childhoods, courtship, and how each of them played an important part in the War of 1812 during James' presidency.