Cómo funcionan los juguetes (How Toys Work)

Learn the secrets to artful cupcakes, oven-fresh bread, and other delicious baked goods in this delightful nonfiction title. Readers will learn how mathematics helps bakers measure their ingredients to make tasteful treats. Featuring vibrant images and charts, informative text, and fun, intriguing facts, this Spanish-translated nonfiction book will leave children fascinated by all the details that go into baking their favorite treats--like doughnuts and cookies!

Readers will be amazed to discover that every time they climb onto bicycles and ride like the wind, they are defying gravity! This book explains the physics and history behind bicycles, skateboards, and surfboards. Readers learn what happens from the simplest movement of rolling forward to more complex tricks and stunts of jumping and spinning. Readers will never look at bikes, skateboards or surfboards the same way again.

The need for speed is the motivating factor in this engaging, Spanish book. Readers learn the history of travel from the very slow to the supersonic and beyond, including everything in between. They learn and discover the factors that influence motion for all types of vehicles: land, air, and water alike. They also learn different ways to measure speed and read about energy uses for different vehicles. With greater speed comes greater risk. Readers learn how engineers are always seeking new and better ways to keep people safe as they travel faster and go farther.

Aunque los estudios de Bachillerato completan, en sí mismos, una etapa de formación, es indudable que en la mayoría de los casos son paso necesario hacia otros estudios de rango universitario. Este libro ha sido diseñado para abarcar esa doble finalidad. Por una parte busca ser un complemento de lo explicado en el libro de texto o en la clase; desea, por otra, ser una ayuda en ese tránsito intermedio entre el Bachillerato y los primeros cursos de Facultades y Escuelas Universitarias.

For thousands of years, militaries around the world were limited to male soldiers. However, throughout history, brave women have stepped out of the background and onto the battlefield. This biographical text covers the important women who’ve broken ground in the military. Famous historical figures such as Joan of Arc, Clara Barton, and Florence Nightingale are covered in depth, while the stories of modern-day heroes are presented to show how women are still affecting change on the front lines. A comprehensive timeline, fact boxes, and historical and modern images complete this...

A biography of the Sioux chief who worked to maintain the rights of Native American people and who led the defeat of General Custer at the Little Big Horn in 1876.

A detailed, full-color Spanish-language atlas teaches children about different regions of the world and includes games, activities, and fun characters to make learning geography stimulating. Original.