Las colonias del Sur: La primera y la ultima de las 13 (The Southern Colonies: F

Defines screws, explains their functions, and suggests simple experiments to demonstrate how they work.

La lagartija despierta tras haberse quedado apaciblemente dormida en el castillo de arena. Piensa que todo ha sido un sueño, que sigue siendo un monstruo horrible. Pero cuando abre los ojos ve a un ser igual a ella, pero de distinto género: un lagartijo. Pronto se enamoran, y tiene muchos hijos con los ojos rojos. Como son muchos, ahora nadie se atreve a meterse con ellos. Y pronto las lagartijas de ojos rojos conocerán a otras lagartijas de ojos negros y se enamorarán. ¿Quién será capaz de distinguirlas entonces?

Before there was the U.S. Constitution, there were the Articles of Confederation. Readers discover the story behind the first written constitution of the United States—from the factors that inspired its creation to the reasons why it was replaced. The detailed main text is enhanced by informative sidebars and graphic organizers. Historical images, including relevant primary sources, allow readers to immerse themselves in this historical period. Readers are given the chance to thoroughly examine elements of the original document, making them feel like true historians. They’re sure to enjoy ...

Different colors are all around us, and this series explores what they look like and where they can be found. Students identify common colors from everyday life, such as red, blue, green, yellow, and how to describe them. They also learn to classify colors by examining what types of objects display each color. Consistently placed and leveled text helps to ensure subject matter is clearly understood.