Cómo podemos utilizar el tornillo?

Follows the life and career of the French scientist who proved the existence of germs and their connection with diseases.

Follows the Thirteen the Amendment that freed the slaves, end of the war, and the death of President Abraham Lincoln.

This inspiring biographical series ties in with elementary history, science, and social studies curricula, providing teachers with a valuable interdisciplinary resource. With these books, young readers will discover historical figures who devoted their lives to making the world a better place, and changed the course of history. Text copyright 2004 Lectorum Publications, Inc.

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.

In the last one hundred years, Earth’s average temperature has risen one full degree. That might not sound like much, but it affects Earth’s oceans, land, plants, and animals. Learn all about global warming, the carbon cycle, the greenhouse effect, and weather and climate with this Spanish science reader that brings the power of science and informational text to students at a level they can understand. This nonfiction book introduces students to new concepts, vocabulary terms, and STEM topics. With detailed images and fascinating sidebars, the leveled text supports students reading at...

While the Great Depression was indisputably a difficult period in American history, it did lead to certain developments that we still benefit from today. One for the most significant examples of this is Social Security, which helps a whole generation of retired Americans. The book offers a concise description of the Great Depression, including analysis of its causes and its effects. Chapters focus on different aspects of the period, including culture, the arts, and science and technology. The dynamic design displays images of posters and experiences from the Depression era. This informative,...

El libro "Soy Sordo 100%" detalla los distinos ejemplos del Audismo que impera en la mayoria de las sociedades humanas, y en este caso particular, las experiencias vividas por jovenes sordos en sus familias, socializando fuera de su hogar y en sus escuelas. La narrativa captura a cabalidad las experiencias que pasan los sordos en el proceso social de integrarse a la corriente regular del sistema de educación. Retrata en forma lo mas aproximadamente posible las vicisitudes que pasan los estudiantes sordos cuando no se toman en cuenta los recursos a los que tienen derecho por ley, como los...