El precio del trono

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!

This Spanish-translated book will be a hit with both thrill seekers and with those who prefer to stay safely on the ground. After an introduction to Newton's three laws of motion, readers learn the mechanics of various amusement park rides including roller coasters, Ferris wheels, merry-go-rounds, and gravity rides. They learn how to measure motion, and how kinetic and potential energy apply to their favorite rides. This 6-Pack includes six copies of this title and a lesson plan.

" El presente volumen quiere ofrecer al lector contemporáneo un acercamiento, sencillo y serio a la vez, a la magistral " " tragicomedia " " de Fernando de Rojas. Por ello, en este libro se aborda la pieza desde la encrucijada histórico-cultural que la vio nacer, atendiendo a cuantos factores contribuyeron a generarla, pero sin abundar en especulaciones eruditas ni obviar la rica problemática que entraña. "

Animals talk with sounds, but they talk with their bodies, too! This engaging Spanish book teaches beginning readers about different ways that animals communicate. Engage students in reading as they develop their early childhood literacy skills. With TIME For Kids content, this full-color book is aligned to state and national standards, and introduces students to simple informational text features.