La Segunda Guerra Mundial (World War II)

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!

Viajaremos por el mundo, continente a continente, para conocer los animales más fascinantes que habitan nuestro planeta. Descubriremos las criaturas más feroces de la sabana africana, los bichos más exóticos de las selvas americanas, las fieras que habitan el continente asiático, los animales más misteriosos y sorprendentes del fondo marino y... ¡muchísimo más! Mi primer Atlas de Animales es un libro indispensable para consultar en casa o en la escuela y convertirte en un especialista de la fauna de nuestro planeta. ¡Un Atlas bestial!

In this fascinating, Spanish-translated nonfiction title, elementary readers are invited to discover terrifying plants and animals of the tropics. Readers will discover what makes poisonous plants so harmful and why dangerous jungle animals are so deadly through engaging features, including bright images, diagrams, and charts, informational text, and captivating facts.

What is matter? Anything that takes up space is matter. Matter can be a water, liquid, or gas. These are the states of matter. Learn about matter with this Spanish science reader that features easy-to-read text. Nonfiction text features include a glossary, index, and detailed images to facilitate close reading and help students connect back to the text. Aligned to state and national standards, the book also includes a fun and engaging science experiment to develop critical thinking and help students practice what they have learned.