Shalini Saxena

This insightful guide to the history and basic concepts of mathematics reveals how math concepts helped to shape society--from the basic counting and units of measurement that facilitated commerce to the kind of surveying techniques and geometry that helped build the Egyptian pyramids. A chronological account of advancements in mathematics ranges Aristotle and al-Khwarizmi (who first used the term "algebra") to high-speed computers and their impact...

This stimulating volume offers a broad collection of the principles of geometry and trigonometry and contains colorful diagrams to bring mathematical principles to life. Subjects are enriched by references to famous mathematicians and their ideas, and the stories are presented in a very comprehensible way. Readers investigate the relationships of points, lines, surfaces, and solids. They study construction methods for drawing figures, a wealth of...

American goldfinches are much beloved across North America, as evidenced by their status as state bird of Iowa, New Jersey, and Washington. These acrobatic little creatures seem to bounce through the air, making them a popular subject for backyard bird watchers. The narrator of this fun journal-styled volume offers a wealth of information about these little yellow-feathered birds as well as how readers can observe their behaviors for themselves. Cool...

Gaining momentum in the early decades of the 20th century, a number of fascist and other authoritarian regimes could be found around the world by the 1950s. Many persist into the present day. Often led by oppressive dictators, these regimes share many characteristics, though each differ in various ways as well. This volume examines the historical trajectory of dictatorship, fascism, and totalitarianism; their characteristics; where they intersected...

One of the few organized team sports that can be enjoyed either indoors or against a backdrop of sun and surf on the beach, volleyball has become a beloved game around the world. International competitions have fueled volleyball's global appeal and earned the sport a dedicated fan base. Readers will learn about the history of this exciting game, how to coordinate various positions, formations, and moves for successful play, and the stories of some...

This examination of elementary algebra begins with the essential first step: explaining how algebra is relevant to real life. After that, readers will be taken on a journey through the highlights of algebra, from its basic principles through real numbers and the application of algebra's fundamental concepts. Diagrams and equations, as well as repetition and building on concepts, help make difficult concepts clear. Sidebars highlighting important historical...

This engrossing guide to the number system and fractions combines the history of math with its practical applications, making the story of math engaging for all readers. Both the number system and computations with fractions constitute important elements of the Common Core mathematical standards for grades 6–8, and in this text, theory and practice combine, giving students an excellent approach to both fields. Sample problems are couched in the...

The reclassification of Pluto in 2006 not only decreased the number of planets in our solar system by one but also introduced the new category of dwarf planet. Readers will come to understand what separates a dwarf planet from a planet-or for that matter from any of the other bodies found within the solar system. They'll learn about Pluto itself, as well as its fellow dwarf planets, Ceres, Makemake, Haumea, and Eris. Full of recent information, this...

Water that lurks beneath the Earth's surface is usually far easier to ignore than the water that covers it-until that water bursts forth above ground as geysers and hot springs. This engaging volume explains to young readers where this water comes from and its relationship to volcanic activity underground. They will also learn where on Earth these spectacular eruptions are found, how geothermal energy can be harnessed for our use, and much more. Striking...

By combining both naval and terrestrial tactics, marine forces have formed a key part of many armed forces in history and are notably often among the first to fight. This thorough guide to the world's most prominent marine corps covers the use of amphibious assaults in the major conflicts of the last two centuries, including the Napoleonic Wars, both World Wars, the Korean War, the Falklands War, and conflicts of the 21st century, among others. Photographs...