Solo Para Chicas/ Girls Rule

Imagine traveling at half the speed of a jet plane without ever leaving the ground! Students will discover the technology that makes such speeds possible, from special tracks and safety precautions to aerodynamically designed trains. What are the limits to the speed of trains? What imposes those limits? Students also will read about the future of passenger train travel, from flying trains to trains that use huge magnets to levitate inches or centimeters off the track. Some trains safely reach speeds of more than 200 mph!

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.

The jaguar is a ferocious animal that roams in areas of dense vegetation. He is the keeper of the American forests. The jaguar is strong, beautiful, famous, vain and a lonely animal. Young readers will be delighted with the jaguar as they learn more about this cat and his habitat.

Corren en manadas, cazan a sus presas y aúllan frente a la luna. Y no importa dónde estés—siempre están escondidos en algún lugar cerca. Gente de todo el mundo teme y ama a los lobos, los cachorritos depredadores del mundo salvaje. ¿Pero realmente los entendemos? En este libro fascinante para niños de nivel 2 en español, aprenderás que la vida de un lobo es mucho más complicada de lo que nosotros creemos. ¿Sabías que cada manada tiene su jefe y sus seguidores? ¿O que los lobos“hablan” entre ellos usando sus cuerpos? ¿O que realmente no quieren atacar a los humanos, que nos ...