La historia de los sistemas numéricos: Valor posicional (The History of Number Systems: Place Value)

Groups of American Indians had been living in the Texas region for thousands of years when American settlers decided to expand westward. This captivating book has been translated into Spanish and explores the history of American Indians in Texas and how each group found different ways to live in the region they inhabited. Readers will learn about a variety of tribes, including Karankawa tribe, Jumano, Caddo, Lipan Apache, and Shoshone and discover how they struggled to survive European colonization, the Indian Removal Act, and American expansion. Other topics include the Dawes Act, Indian...

En 1955, poco antes de su muerte, Albert Einstein rescata un cuaderno de notas que escribió diez años antes, cuando se lanzaron sobre Japón las bombas atómicas de Hiroshima y Nagasaki. En ese cuaderno, Einstein cuenta cómo su vocación por la ciencia se despertó el día en que su padre le regaló una brújula y empezó a preguntarse por qué apuntaba siempre en la misma dirección. El logro más conocido de Einstein fue su teoría de la relatividad, que transformó nuestro concepto del espacio y del tiempo. Pero cuando recibió el Premio Nobel de Física en 1921 no fue por esa teoría,...

A licensed clinical social worker utilizes art therapy to help youngsters deal with the death of a loved one, exploring the concept of death, grief, and the feelings children experience when someone special dies. (Psychology & Self-Help)

Students will gain a deeper understanding of the Cold War by delving into major social studies topics in this project-based examination. The volume presents a series of broad questions touching on major themes in the social studies curriculum. Each question is accompanied by several paragraphs examining that question in the context of the Cold War, as well as a detailed project that prompts readers to think critically and present their findings or opinions in a particular format, such as a poster with side-by-side comparisons, a persuasive essay, or a class presentation.