Harriet Tubman

Light can travel faster than anything else in the universe. But what exactly is light, and where does it come from? This nonfiction Spanish book teaches students all about light, and introduces them to important scientific concepts and vocabulary terms like infrared, ultraviolet, photos, and visible spectrum. The intriguing images, detailed diagrams, and stimulating sidebars will keep students connected to the text. The fun lab activity provides a real-world learning experience that supports STEM instruction. Aligned to state and national standards, the leveled text supports differentiation....

En un futuro próximo, los recursos energéticos de la Tierra han sufrido una radical transformación. Los suministros tradicionales casi se han agotado y el hombre se ha establecido en la Luna para extraer un combustible alternativo. Éste es el punto de partida de Límite, una novela dinámica, trepidante y cargada de suspense. Fruto de una rigurosa investigación científica, y con un marcado acento ecológico, Frank Schätzing invita al lector a derribar sus barreras mentales y a disfrutar sin límites de este thriller de rabiosa actualidad que no dejará a nadie indiferente.

Knowing when to say we're sorry means knowing when we've hurt someone, whether it was intentional or not. This is not always easy to do, especially for children. This book presents readers with a variety of relatable scenarios in which young people recognize the need for an apology. Readers follow Louis as he shares an embarrassing secret about Aaron with his other classmates, who make fun of Aaron. Louis feels bad for sharing Aaron's secret. What can he do? Each colorful spread presents a different real-life situation that will instill in readers the importance of knowing when to say, "I'm...

When winter hits, many people in colder climates spend most of their time indoors. But what do wild animals do? Some animals spend winters hibernating. Beginning readers will learn what hibernation is, why some animals hibernate and others don't, and how hibernating animals prepare for their long sleep. Full-color photographs grab readers' attention and allow them to draw connections to the narrative. Readers will love learning about this mysterious, restful time in some animals' lives.